Online Etymology Dictionary

hatha-yoga (n.): 1911, from Sanskrit hatha "force, violence, forced meditation" + yoga (see yoga).
Hathor: cow-goddess of love and joy in ancient Egypt, identified by the Greeks with their Aphrodite, from Greek Hathor, from Egyptian Het-Heru "mansion of Horus," or possibly Het-Herh "the house above."
hatless (adj.): mid-15c., from hat + -less.
hatred (n.): early 13c., from hate (v.) + rare suffix -red (indicating condition or state), from Old English ræden "state, condition," related to verb rædan "to advise, discuss, rule, read, guess." See read (v.) and compare the second element of kindred and proper names Æþelræd and Alfred.
hatter (n.): late 14c., from hat + -er (1). Their association with madness dates to at least 1837.
hauberk (n.): c. 1300, from Old French hauberc "coat of mail," earlier holberc, from Frankish *halsberg or a similar Germanic source, literally "neck-cover" (cognates: Old English halsbearh, Old High German halsberc), from *hals "neck" (from Proto-Germanic *h(w)als-, from PIE *kwolso-; see collar (n.)) + *bergan "to cover, protect" (see bury (v.)).
haught (adj.): c. 1300, haut, "great, high;" mid-15c., "high in one's own estimation, haughty," from Old French haut (11c.) "main, principal; proud, noble, dignified; eminent; loud; grand," literally "high," from Latin altus "high" (see old); with initial h- in French by influence of Frankish hoh "high." Spelling in English altered to -gh- 16c. by influence of caught, naught, etc., or of high. Related: Haughtily.
haughtiness (n.): 1550s, from haughty + -ness. Earlier was haughtness (late 15c.), from haut (adj.).
haughty (adj.): "proud and disdainful," 1520s, a redundant extension of haught (q.v.) "high in one's own estimation" by addition of -y (2) on model of might/mighty, naught/naughty, etc. Middle English also had hautif in this sense (mid-15c., from Old French hautif), and hautein "proud, haughty, arrogant; presumptuous" (c. 1300), from Old French hautain. Related: Haughtily.
haul (v.): "pull or draw forcibly," 1580s, hall, variant of Middle English halen "to drag, pull" (see hale (v.)). Spelling with -au- or -aw- is from early 17c. Related: Hauled; hauling. To haul off "pull back a little" before striking or otherwise acting is American English, 1802.
haul (n.): 1660s, "act of pulling," from haul (v.). Meaning "something gained" is from 1776, a figurative use from the meaning "the quantity of fish taken in one haul of a net," or perhaps on the notion of "drawing" a profit. Meaning "distance over which something must be hauled" (usually with long or short) is attested from 1873.
haulage (n.): 1826, "action of hauling," from haul (v.) + -age.
hauler (n.): 1670s, from haul (v.) + -er (1).
haunch (n.): early 13c., from Old French hanche "hip, thigh; haunch" (12c.), from Frankish *hanka or a similar Germanic source (cognates: Old High German hinkan "to limp," ancha "leg," literally "joint;" Middle Dutch hanke "haunch"). "It is only since the 18th c. that the spelling haunch has displaced hanch" [OED]. Related: Haunches.
haunch-bone (n.): late 14c., from haunch + bone (n.).
haunt (v.): early 13c., "to practice habitually, busy oneself with, take part in," from Old French hanter "to frequent, visit regularly; have to do with, be familiar with; indulge in, cultivate" (12c.), of uncertain origin, perhaps from Old Norse heimta "bring home," from Proto-Germanic *haimatjanan "to go or bring home," from *haimaz- "home" (see home (n.)).

Meaning "to frequent (a place)" is from c. 1300 in English. In Middle English to haunte scole was "attend school," and in Middle English as in Old French the verb had a secondary sense of "have sexual intercourse with." Use in reference to a spirit or ghost returning to the house where it had lived perhaps was in Proto-Germanic, but if so it was lost or buried; revived by Shakespeare's plays, it is first recorded 1590 in "A Midsummer Night's Dream." Old French had a noun derivative, hantise "obsession, obsessive fear" (14c.).
haunt (n.): c. 1300, "place frequently visited," also in Middle English, "a habit, custom" (early 14c.), from Old French hant "frequentation; place frequently visited," from hanter (see haunt (v.)). The meaning "spirit that haunts a place, ghost" is first recorded 1843, originally in stereotypical African-American vernacular, from the later meaning of the verb.
haunted (adj.): early 14c., "accustomed;" mid-14c., "stirred, aroused;" early 15c., "frequent;" 1570s, "much-frequented;" past participle adjective from haunt (v.). Meaning "visited by ghosts" is from 1711; haunted house attested by 1733.
haunting (adj.): late 14c., present participle adjective from haunt (v.). Middle English hauntingly meant "frequently" (mid-15c.); sense of "so as to haunt one's thoughts or memory" is from 1859.
haunts (n.): "place or places one frequents," early 14c.; see haunt (n.).
hausfrau (n.): 1798, from German Hausfrau, literally "housewife;" see house (n.) + frau.
hautboy (n.): "oboe, double-reeded woodwind instrument," 1570s, from French hautbois "high wood" (15c.; see oboe, which is the Italian phonetic spelling of the French word). The haut is used here in its secondary sense of "high-pitched." In early use frequently nativized as hoboy, hawboy, etc.
This Pageaunt waz clozd vp with a delectable harmony of Hautboiz, Shalmz, Coronets, and such oother looud muzik. [Robert Laneham, 1575]
haute (adj.): French, literally "high," fem. of haut (see haught). Haute bourgeoisie "the (French) upper-middle class" is in English from 1804.
haute cuisine (n.): 1829, French, literally "high(-class) cooking;" see haught + cuisine. Usually in italics until 1960s.
hauteur (n.): "a haughty bearing, arrogance of manner," 1620s, from French hauteur "haughtiness, arrogance," literally "height," from Old French hauture "height, loftiness; grandeur, majesty" (12c.), from haut (see haught).
Havana: Cuban capital city, founded 1514 by Diego Velázquez as San Cristóbal de la Habana "St. Christopher of the Habana," apparently the name of a local native people. The Spanish adjective form is Habanero. Meaning "cigar made in Havana" is by 1826.
have (v.): Old English habban "to own, possess; be subject to, experience," from Proto-Germanic *haben- (source also of Old Norse hafa, Old Saxon hebbjan, Old Frisian habba, German haben, Gothic haban "to have"), from PIE *kap- "to grasp" (see capable). Not related to Latin habere, despite similarity in form and sense; the Latin cognate is capere "seize.

Sense of "possess, have at one's disposal" (I have a book) is a shift from older languages, where the thing possessed was made the subject and the possessor took the dative case (as in Latin est mihi liber "I have a book," literally "there is to me a book"). Used as an auxiliary in Old English, too (especially to form present perfect tense); the word has taken on more functions over time; Modern English he had better would have been Old English him (dative) wære betere.

To have to for "must" (1570s) is from sense of "possess as a duty or thing to be done" (Old English). Phrase have a nice day as a salutation after a commercial transaction attested by 1970, American English. Phrase have (noun), will (verb) is from 1954, originally from comedian Bob Hope, in the form Have tux, will travel; Hope described this as typical of vaudevillians' ads in "Variety," indicating a willingness and readiness to perform anywhere.
have-not (n.): "poor person," 1742, from have + not. Have in the sense of "one who 'has,' one of the wealthier class of persons" is from the same source. Earliest in translation of "Don Quixote:
'There are but two families in the world, as my grandmother used to say; "the Have's and the Have-not's," and she stuck to the former; and now-a-days, master Don Quixote, people are more inclined to feel the pulse of Have than of Know.' ["Don Quixote de la Mancha," transl. Charles Jarvis, London, 1742]
haven (n.): late Old English hæfen "haven, port," from Old Norse höfn "haven, harbor" or directly from Proto-Germanic *hafno- (source also of Danish havn, Middle Low German havene, German Hafen), perhaps from PIE *kap- "to seize, hold contain" (see capable, and compare have) on notion of place that "holds" ships. But compare Old Norse haf, Old English hæf "sea" (see haff). Figurative sense of "refuge," now practically the only sense, is c. 1200.
haver (n.2): "owner, possessor," late 14c., agent noun from have.
haver (n.1): "oats," Northern English, late 13c., probably from Old Norse hafre, from Proto-Germanic *habron- (source also of Old Norse hafri, Old Saxon havoro, Dutch haver, Old High German habaro, German Haber, Hafer). Buck suggests it is perhaps literally "goat-food" and compares Old Norse hafr "he-goat." "Haver is a common word in the northern countries for oats." [Johnson]
haversack (n.): 1735, from French havresac (1670s), from Low German hafersach "cavalry trooper's bag for horse provender," literally "oat sack," from the common Germanic word for "oat" (see haver (n.1)) + sack (n.1).
havoc (n.): early 15c., from the expression cry havoc "give the signal to pillage" (Anglo-French crier havok, late 14c.). Havok, the signal to soldiers to seize plunder, is from Old French havot "pillaging, looting" (in crier havot), which is related to haver "to seize, grasp," hef "hook," probably from a Germanic source (see hawk (n.)), or from Latin habere "to have, possess." General sense of "devastation" first recorded late 15c.
haw (n.): "enclosure," Old English haga "enclosure, fortified enclosure; hedge," from Proto-Germanic *hag- (source also of Old Norse hagi, Old Saxon hago, German Hag "hedge;" Middle Dutch hage, Dutch haag, as in the city name The Hague), from PIE root *kagh- "to catch seize; wickerwork fence" (see hedge (n.), and compare hag). Meaning "fruit of the hawthorn bush" (Old English) is perhaps short for *hægberie.
haw (v.): "hesitate in speech," 1580s, imitative. Related: Hawed; hawing. The noun in this sense is from c. 1600. Haw-haw in reference to a style of affected upper class British enunciation is from 1841, imitative.
Hawaii: from Hawaiian Hawai'i, from Proto-Polynesian *hawaiki. Said to mean "Place of the Gods" and be a reference to Mauna Kea and Mauna Loa. See also sandwich. Related: Hawaiian (1825). First record of Hawaiian shirt is from 1943.
hawbuck (n.): "unmannerly lout," 1803.
hawk (n.): c. 1300, hauk, earlier havek (c. 1200), from Old English hafoc (West Saxon), heafuc (Mercian), heafoc, "hawk," from Proto-Germanic *habukaz (source also of Old Norse haukr, Old Saxon habuc, Middle Dutch havik, Old High German habuh, German Habicht "hawk"), from a root meaning "to seize," from PIE *kap- "to grasp" (source also of Russian kobec "a kind of falcon;" see capable). Transferred sense of "militarist" attested from 1956, probably based on its opposite, dove.
hawk (v.1): "to sell in the open, peddle," late 15c., back-formation from hawker "itinerant vendor" (c. 1400), agent noun from Middle Low German höken "to peddle, carry on the back, squat," from Proto-Germanic *huk-. Related: Hawked; hawking. Despite the etymological connection with stooping under a burden on one's back, a hawker is technically distinguished from a peddler by use of a horse and cart or a van.
hawk (v.2): "to hunt with a hawk," mid-14c., from hawk (n.).
hawk (v.3): "to clear one's throat," 1580s, imitative.
hawker (n.): "one who hunts with a hawk," Old English hafocere; see hawk (n.) + -er (1). For sense "one who sells or peddles," see hawk (v.1).
Hawkeye (n.): "inhabitant of Iowa," 1839, said to have been the name of an Indian chief, from hawk (n.) + eye (n.). It also was one of the nicknames of the hero, Natty Bumppo, in Fenimore Cooper's "Leatherstocking" novels (1826).
hawkish (adj.): "hawk-like," by 1703, from hawk (n.) + -ish. Sense of "militaristic" is from 1965, from hawk in the transferred sense.
hawkshaw (n.): "detective," 1866, U.S. slang, from name of the detective in "The Ticket-of-Leave Man," 1863 play by English dramatist Tom Taylor (1817-1880); it later was used in the comic strip "Hawkshaw the Detective" (1913-1947) by U.S. cartoonist Gus Mager (1878-1956). The surname is attested from late 13c., from a place name in Lancashire, with shaw "undergrowth, woodland, scrub," from Old English sceaga.
hawse (n.): "part of a ship's bow containing the hawse-holes," late 15c., from Old English or Old Norse hals "part of a ship's prow," literally "neck," from Proto-Germanic *h(w)als- (see collar). Respelled with -aw- 16c.
hawser (n.): "large rope used for mooring, towing, etc.," late 13c., from Anglo-French haucer, from Old French halcier, haucier, literally "hoister," from Vulgar Latin *altiare, alteration of Late Latin altare "make high," from altus "high" (see old). Altered in English on mistaken association with hawse and perhaps haul.
hawthorn (n.): Old English hagaþorn, earlier hæguþorn "hawthorn, white thorn," from obsolete haw "hedge or encompassing fence" (see haw (n.)) + thorn. So called because it was used in hedges. A common Germanic compound: Middle Dutch hagedorn, German hagedorn, Swedish hagtorn, Old Norse hagþorn.
hay (n.): "grass mown," Old English heg (Anglian), hieg, hig (West Saxon) "grass cut or mown for fodder," from Proto-Germanic *haujam (source also of Old Norse hey, Old Frisian ha, Middle Dutch hoy, German Heu, Gothic hawi "hay"), literally "that which is cut," or "that which can be mowed," from PIE *kau- "to hew, strike" (source also of Old English heawan "to cut;" see hew). Slang phrase hit the hay (pre-1880) was originally "to sleep in a barn;" hay in the general figurative sense of "bedding" is from 1903; roll in the hay (n.) is from 1941.
hay fever (n.): also hay-fever, 1825, from hay + fever. Also called summer catarrh (1828); not much noted before the 1820s, when it was sometimes derided as a "fashion" in disease.
People are apt to sneeze, in hot weather for example; and people do not die of sneezing now-a-days, as they did in days that no one knows any thing about. We cannot give six draughts a-day, at one and nine pence each, for sneezing: call it the hay-fever. What a wonderful man! what a clever man! he understands the hay-fever: call him in! Thus is the hay-fever among the last in the list of fashionables. ["On Fashions in Physic," London Magazine, October 1825]