Etymology
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oneiro- 

before vowels oneir-, word-forming element meaning "of or pertaining to a dream or dreams," from Greek oneiros "a dream," a word of uncertain origin, perhaps related to Armenian anurj, Albanian (Gheg) âdërrë.

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onco- 

word-forming element meaning "bulk, mass," used from 19c., especially in medical use, "tumor," from Latinized form of Greek ogkos (pronounced "onkos") "bulk, size, mass, weight, swelling," in Modern Greek "tumor," a word of uncertain origin.

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one-time (adj.)

"that was, former," by 1850, from one + time (n.).

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afoot (adv., adj.)

c. 1200, afote, "on foot, walking, not on horseback," contraction of prepositional phrase on fotum; see a- (1) "on" + foot (n.). Meaning "astir, on the move" is from 1520s; figurative sense of "in active operation" is from 1601 ("Julius Caesar").

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ablaze (adv.)

late 14c., "on fire," from a "on" (see a- (1)) + blaze (n.).

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astride (adv.)

"with one leg on each side," 1660s, from a- (1) "on" + stride (n.).

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aflame (adv., adj.)

"on fire, ablaze," 1550s, from a- (1) "on" + flame (n.). Figurative use by 1856.

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sled (v.)

"transport on a sled," 1718; "ride on a sled," 1780, from sled (n.). Related: Sledded; sledding.

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tenterhooks (n.)

plural of tenterhook (late 15c.), "one of the hooks that holds cloth on a tenter," from tenter (q.v.) + hook (n.). The figurative phrase on tenterhooks "in painful suspense" is from 1748; earlier to be on tenters (1530s).

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q.t. (n.)

slang for "quiet," in phrase on the q.t., attested from 1874. Phrase on the quiet appears from 1847.

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