Online Etymology Dictionary

Hinduism (n.): blanket term for "polytheism of India," 1786, from Hindu + -ism.
Hindustan: 1610s, from Persian, literally "country of the Hindus;" see Hindu + -stan. Related: Hindustani, the old name for Urdu.
hine: see hin.
hinge (n.): c. 1300, "the axis of the earth;" late 14c. as "movable joint of a gate or door," not found in Old English, cognate with Middle Dutch henghe "hook, handle," Middle Low German henge "hinge," from Proto-Germanic *hanhan (transitive), *hangen (intransitive), from PIE *konk- "to hang" (see hang (v.)). The notion is the thing from which a door hangs. Figurative sense of "that on which events, etc., turn" is from c.1600. Stamp-collecting sense is from 1883.
hinge (v.): c. 1600, "to bend," from hinge (n.). Meaning "turn on, depend" (figuratively) is from 1719. Related: Hinged; hinging.
hinny (n.): "a mule got from a she-ass by a stallion," 1680s, from Latin hinnus, from Greek innos, ginnos, of unknown origin.
hinny (v.): "to neigh," c. 1400, of imitative origin.
hint (n.): c. 1600 (Shakespeare), "an indirect suggestion intended to be caught by the knowing," apparently from obsolete hent, from Middle English hinten "to tell, inform" (c. 1400), from Old English hentan "to seize," from Proto-Germanic *hantijan (source also of Gothic hinþan "to seize"), related to hunt (v.). OED dates the sense "small piece of practical information" to 1777.
hint (v.): 1640s, "suggest in an indirect manner," from hint (n.). Related: Hinted; hinting.
hinterland (n.): 1890, from German Hinterland, from hinter "behind" (see hinder (adj.)) + Land "country" (see land (n.)). What in English would be called the back-country.
hip (n.1): "part of the human body where pelvis and thigh join," Old English hype "hip," from Proto-Germanic *hupiz (source also of Dutch heup, Old High German huf, German Hüfte, Swedish höft, Gothic hups "hip"), of uncertain origin. In architecture, "external angle at the junction of two sides of a roof," from late 17c. Hip-flask, one meant to fit in a hip pocket, is from 1923. Related: Hips.
hip (n.2): "seed pod" (especially of wild rose), a 16c. alteration of Middle English hepe, from Old English heope, hiope "seed vessel of the wild rose," from Proto-Germanic *hiup- (source also of dialectal Norwegian hjupa, Old Saxon hiopo, Dutch joop, Old High German hiafo, dialectal German Hiefe, Old English hiopa "briar, bramble"), of unknown origin.
hip (adj.): "informed," 1904, apparently originally in African-American vernacular, probably a variant of hep (1), with which it is identical in sense, though it is recorded four years earlier.
hip (interj.): exclamation used to introduce a united cheer (as in hip-hip-hurrah), 1827, earlier hep; compare German hepp, to animals a cry to attack game, to mobs a cry to attack Jews (see hep (2)); perhaps a natural sound (such as Latin eho, heus).
hip-hop: also hiphop, music style, 1982. Reduplication with vowel variation (as in tip-top, sing-song); OED reports use of hip hop (adv.) with a sense of "successive hopping motion" dating back to 1670s. The term in its modern sense comes from its use in the early rap lyrics of the genre, notably Grandmaster Flash and the Furious Five and The Sugarhill Gang in "Rapper's Delight."
hip-shot (adj.): "with the hip dislocated," 1630s, from hip (n.1) + shot (adj.). The notion is "with the hip shot out of place."
hiphuggers (n.): also hip-huggers, "low-rise pants or skirt," 1966, from hip + agent noun from hug. So called because they are slung from the hips, not the waist. Earlier as the name of a cut of women's swimsuit (1963). Hiphugger (adj.) is attested from 1966.
hipped (adj.): "having hips," c. 1500, past participle adjective; see hip (n.1)). In architecture (of roofs) from 1785.
hippety-hop (adv.): 1855, earlier hippety-hoppety (1825); see hip-hop.
hippie (n.): c. 1965, American English (Haight-Ashbury slang); earlier (1953) a variant (usually disparaging) of hipster (1941) "person keenly aware of the new and stylish," from hip "up-to-date" (see hip (adj.)). Related: Hippiedom.
hippish (adj.): "somewhat depressed, moping," 1706, from hip (n.) "melancholy," a variant of hyp, short for hypochondria.
hippo (n.): short for hippopotamus, attested from 1872.
hippo-: before vowels, hipp-, word-forming element meaning "horse," from Greek hippo-, from hippos "horse," from PIE *ekwo- (see equine).
hippocampus (n.): c. 1600, a kind of sea monster, part horse and part dolphin or fish, often pictured pulling Neptune's chariot, from Late Latin hippocampus, from Greek hippokampos, from hippos "horse" (see equine) + kampos "a sea monster," which is perhaps related to kampe "caterpillar." Used from 1570s as a name of a type of fish (the seahorse); of a part of the brain from 1706, on supposed resemblance to the fish.
Hippocratic (adj.): 1610s, from Medieval Latin Hippocraticus, "pertaining to Hippocrates" (c. 460-377 B.C.E.), the famous ancient Greek physician and "father of medicine." Hippocratic Oath is attested from 1747; it is in the spirit of Hippocrates but was not written by him. The Hippocratic face (1713) is the expression immediately before death or in extreme exhaustion, and is so called from his vivid description of it. The name is literally "one superior in horses;" from hippos "horse" (see equine) + kratia "rule" (see -cracy).
Hippocrene: fount on Mount Helicon sacred to the Muses, its waters were held to bestow poetic inspiration, from Greek Hippokrene, earlier hippou krene, literally "horse's fountain," from genitive of hippos "horse" (see equine) + krene "fountain."
hippocrepian (adj.): "horseshoe-shaped," 1852, from Latinized form of Greek hippos "horse" (see equine) + krepis "a boot."
hippodrome (n.): "horse race-course," 1580s, from French hippodrome, from Latin hippodromos "race course," from Greek hippodromos "chariot road, race course for chariots," from hippos "horse" (see equine) + dromos "course" (see dromedary). In modern use, "circus performance place" (mid-19c.), and thus extended to "large theater for stage shows." In old U.S. sporting slang, "a fixed match or race."
hippogriff (n.): also hippogryph, 1650s, from French hippogriffe (16c.), from Italian ippogrifo, from Greek hippos "horse" (see equine) + Italian grifo, from Late Latin gryphus "griffin" (see griffin). A creature part griffin, but with body and hind parts in the form of a horse. "[A]pparently invented, in imitation of Pegasus, by the romancers of the middle ages, and furnished to their heroes as a means of transportation through the air" [Century Dictionary].
Hippolyte: name of an Amazon in Greek mythology, daughter of Ares, from Greek Hippolyte, fem. of Hippolytos (see Hippolytus).
Hippolytus: masc. proper name, son of Theseus in Greek mythology, from Greek Hippolytos, literally "letting horses loose," from hippos "horse" (see equine) + stem of lyein (see lose (v.)).
hippomania (n.): "excessive fondness for horses" (especially in reference to the intense and passionate interest in horses developed in some girls between ages 10 and 14), 1956, from hippo- "horse" + mania.
hippomobile (n.): 1900, "A word used in the early days of motor vehicles for a horse-drawn vehicle" [OED], from French, from hippo- "horse" + ending from automobile.
hippophagy (n.): "act or practice of feeding on horseflesh," 1823, from hippo- "horse" + -phagy "eating" (see -phagous). Ptolemy uses hippophagi of certain nomadic tribes of central Asia. Related: Hippophagous (1828).
Europeans have generally regarded horse-flesh as unfit for food; but hippophagy or horse-eating has always existed among some rude races, and has been advocated by many gastronomers in Europe. In Paris horse-flesh has long been surreptitiously dealt in as a cheap article of diet, and its sale, under strict official supervision, was authorized in 1866. The necessary use of it there during the siege of 1870-1 brought it into more general favor, which has been maintained. It is also eaten to some extent in other countries. [Century Dictionary, 1903]
hippophile (n.): "horse-lover," 1852, from hippo- "horse" + -phile "one that loves."
hippopotamus (n.): omnivorous ungulate pachydermatous mammal of Africa, 1560s, from Late Latin hippopotamus, from Greek hippopotamus "riverhorse," an irregular formation from earlier ho hippos potamios "the horse of the river"), from hippos "horse" (see equine) + adjective from potamos "river, rushing water" (see potamo-). Replaced Middle English ypotame (c. 1300), which is from the same source but deformed in Old French. Glossed in Old English as sæhengest.
Ypotamos comen flyngynge. ... Grete bestes and griselich ["Kyng Alisaunder," c. 1300]
Related: Hippopotamic.
hippy (adj.): "having prominent hips," 1919, from hip (n.1) + -y (2).
hipster (n.): 1941, "one who is hip;" from hip (adj.) + -ster. Meaning "low-rise" in reference to pants or a skirt is from 1962; so called because they ride on the hips rather than the waist (see hiphuggers). Related: Hipsters (1962, of waistlines).
hir (pron.): Middle English obsolete form of her.
hiragana (n.): cursive form of Japanese writing, 1822, from Japanese hiragana, from hira "plain" + kana "borrowed letter(s)."
Hiram: masc. proper name, from Phoenician/Hebrew Hiram, perhaps short for Ahiram, literally "brother of the lofty."
hircine (adj.): "goat-like," 1650s, from Latin hircinus "like a goat, of a goat," from hircus "he-goat, buck," which is probably related to hirsutus "shaggy, rough-haired" (see hirsute). "In general, words for 'goat' lack a PIE etymology" [de Vaan]. Latin also had hircosus "smelling like a goat," and hirquitallus "adolescent boy." English has used hircinous for "having a goat-like odor."
hire (v.): Old English hyrian "pay for service, employ for wages, engage," from Proto-Germanic *hurjan (source also of Danish hyre, Old Frisian hera, Dutch huren, German heuern "to hire, rent"), of uncertain origin. Reflexively, "to agree to work for wages" from mid-13c. Related: Hired; hiring.
hire (n.): "payment for work, use, or services; wages," from late Old English hyr "wages; interest, usury," from the verb or from a Proto-Germanic *hurja- (see hire (v.)). Cognate with Old Frisian here, Dutch huur, German heuer, Danish hyre.
hiree (n.): 1811, from hire (v.) + -ee.
hireling (n.): "one who works for hire," Old English hyrling; see hire (v.) + -ling. Now only disparaging, "one who acts only for mercenary motives," a sense that emerged late 16c. As an adjective by 1580s.
Hiroshima: city in Japan, literally "broad island," from Japanese hiro "broad" + shima "island." So called in reference to its situation on the delta of the Ota River.
hirsute (adj.): "hairy," 1620s, from Latin hirsutus "rough, shaggy, bristly," figuratively "rude, unpolished," related to hirtus "shaggy," and possibly to horrere "to bristle with fear" (see horror).
hirsutism (n.): 1905, as a human condition, from hirsute + -ism.
his (pron.): Old English his (genitive of he), from Proto-Germanic *hisa (source also of Gothic is, Old Saxon is, German es). Originally also the neuter possessive pronoun, but in English it was replaced in that sense c. 1600 by its. In Middle English, hisis was tried for the absolute pronoun (compare her/hers), but it failed to stick. For dialectal his'n, see her.

In 16c.-17c. commonly used in place of a genitive inflection after nouns whose nominative ends in -s (for example, "When this Book became a particular book, that is, when Moses his book was divided into five parts, I cannot trace." [Donne, "Essayes in Divinity," "Exodus," 1651]). Here it is perhaps an expanded vocalized form of 's, originally -es. This tendency began in late Old English and was obsolete from c. 1750.