Etymology
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roller-skate (n.)

also rollerskate, "a skate mounted on small wheels instead of iron or steel runners," 1861, American English, from roller + skate (n.2). The verb is from 1885. Related: Roller-skated; roller-skater; roller-skating.

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suckle (v.)
c. 1400, perhaps a causative or frequentative form of Middle English suken "to suck" (see suck), but OED suggests instead a back-formation from suckling (though this word is attested only from mid-15c.). Related: Suckled; suckling.
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dilation (n.)

"act of dilating," 1590s, formed from dilate on the mistaken assumption that the -ate in that word was the Latin verbal suffix (it is instead part of the stem); the proper form, dilatation, is older (c. 1400).

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Barabbas 
biblical masc. proper name, Greek Barabbas, from Aramaic (Semitic) barabba, "son of the father," or "son of the master." In Hebrew, it would be ben abh. In the Crucifixion story, the name of the prisoner freed instead of Jesus at the crowd's insistence.
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stere (n.)

unit of the metric system for solid measure, 1798, from French stère "unit of volume equal to one cubic meter," from Greek stereos "solid, stiff, firm" (from PIE root *ster- (1) "stiff"). Little used, cubic meter generally serving instead.

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initialize (v.)
"to make ready for operation," 1957, from initial (adj.) + -ize. The same formation had been used earlier to mean "use initials instead of a name" (1837); "designate by initials" (1833). Related: Initialized; initializing; initialization (1957 in the modern sense).
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washer (n.2)
"flat ring for sealing joints or holding nuts," mid-14c., generally considered an agent noun of wash (v.), but the sense connection is difficult, and the noun may derive instead from the ancestor of French vis "screw, vise" (see vise).
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retrovirus (n.)

1977, earlier retravirus (1974), from re(verse) tra(nscriptase) + connective -o- + virus. So called because it contains reverse transcriptase, an enzyme that uses RNA instead of DNA to encode genetic information, which reverses the usual pattern. Remodeled by influence of retro- "backwards."

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kayles (n.)
old game similar to bowls except a club or stick was thrown instead of a ball, from kail, from Middle English kayle "a pin, ninepin, skittlepin;" cognate with German Kegel, Danish kegle. Also the name of a game with nine holes drilled in the ground (an iron ball is rolled among them).
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vice- 

word-forming element meaning "deputy, assistant, substitute," also "instead of, in place of," 15c., from Latin vice "in place of," ablative of vicis "a change, a turn, interchange alternation" (from PIE root *weik- (2) "to bend, to wind"). In Middle English sometimes borrowed in Old French form vis-, vi-.

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