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5406 entries found
steno- 
before vowels sten-, word-forming element meaning "narrow," from Greek stenos "narrow, strait," as a noun "straits of the sea, narrow strip of land," also metaphorically, "close, confined; scanty, petty," from PIE *sten- "narrow."
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step- 
Old English steop-, with connotations of "loss," in combinations like steopcild "orphan," related to astiepan, bestiepan "to bereave, to deprive of parents or children," from Proto-Germanic *steupa- "bereft" (source also of Old Frisian stiap-, Old Norse stjup-, Swedish styv-, Middle Low German stef-, Dutch stief-, Old High German stiof-, German stief-), literally "pushed out," from PIE *steup-, from root *(s)teu- (1) "to push, stick, knock," with derivatives referring to fragments (see steep (adj.)). Barnhart suggests the forms in -f- are by assimilation of the first sound in following words for "father."

Etymologically, a stepfather or stepmother is one who becomes father or mother to an orphan, but the notion of orphanage faded in 20c. and came to denote simply relation through marriage. For sense evolution, compare Latin privignus "stepson," related to privus "deprived." Compare orphan (n.).
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stereo- 

before vowels stere-, word-forming element meaning "solid, firm; three-dimensional; stereophonic," from Greek stereos "solid" (from PIE root *ster- (1) "stiff").

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strato- 
before vowels strat-, word-forming element referring to layers or layering, also stratus clouds, from combining form of Latin stratus "a spreading," from PIE root *stere- "to spread."
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strepto- 
word-forming element used in science to mean "twisted," from Latinized combining form of Greek streptos "twisted, easy to bend, pliant," verbal adjective of strephein "to turn, twist," from PIE root *streb(h)- "to wind, turn."
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sub- 
word-forming element meaning "under, beneath; behind; from under; resulting from further division," from Latin preposition sub "under, below, beneath, at the foot of," also "close to, up to, towards;" of time, "within, during;" figuratively "subject to, in the power of;" also "a little, somewhat" (as in sub-horridus "somewhat rough"), from PIE *(s)up- (perhaps representing *ex-upo-), a variant form of the root *upo "under," also "up from under." The Latin word also was used as a prefix and in various combinations.

In Latin assimilated to following -c-, -f-, -g-, -p-, and often -r- and -m-. In Old French the prefix appears in the full Latin form only "in learned adoptions of old Latin compounds" [OED], and in popular use it was represented by sous-, sou-; as in French souvenir from Latin subvenire, souscrire (Old French souzescrire) from subscribere, etc.

The original meaning is now obscured in many words from Latin (suggest, suspect, subject, etc.). The prefix is active in Modern English, sometimes meaning "subordinate" (as in subcontractor); "inferior" (17c., as in subhuman); "smaller" (18c.); "a part or division of" (c. 1800, as in subcontinent).
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suc- 
the usual form of sub- before -c-, an assimiliation from Latin.
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sucro- 
before vowels sucr-, scientific word-forming element meaning "sugar," from Latinized form of French sucre "sugar" (see sugar (n.)).
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suf- 
assimilated form of sub- before -f-.
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sug- 
assimilated form of sub- before -g-.
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