英语词源字典 - 在线词源网站

backless (adj.)[backless 词源字典]: 1926, in reference to women's clothing, from back (n.) + -less.[backless etymology, backless origin, 英语词源]
backlist (n.): 1946, in publishing, from back (adj.) + list (n.). As a verb, "to put on the back list," from 1983. Related: Backlisted.
backlog (n.): 1680s, "large log placed at the back of a fire," from back (adj.) + log (n.1). Figurative sense of "something stored up for later use" is first attested 1883, but this and the meaning "arrears of unfulfilled orders" (1932) might be from, or suggested by, log (n.2).
backorder: also back-order, by 1980 (n.); 1985 (v.), from back (adj.) + order. Related: Backordered.
backpack: 1914 as a noun, 1916 as a verb, from back (n.) + pack (n.). Related: Backpacked; backpacking.
backside (n.): c. 1400, from back (adj.) + side (n.). In the specific sense of "rump, buttocks" it is first recorded c. 1500.
backslash (n.): 1982, new punctuation symbol introduced for computer purposes, from back (adj.) + slash (n.).
backslide (v.): in the religious sense, 1580s, from back (adj.) + slide (v.). Related: Backslider; backsliding (1550s).
backspace (adj.): also back-space, 1899, in reference to keyboarding, from back (adv.) + space.
We have had the pleasure of examining one of the 1899 model Hammond typewriters, with the new back-space key. This new feature is certainly an improvement in the machine. ["The Phonetic Journal," March 11, 1899]
backstabber (n.): also back-stabber, in the figurative sense, 1839, from back (n.) + agent noun from stab (v.). The verb backstab in the figurative sense is from 1925.
backstage: also back-stage, 1898, from back (adj.) + stage (n.).
backstairs: "stairs at the back of a structure," 1650s, from back (adj.) + stairs (see stair). Figurative use is attested earlier (1640s).
backstop (n.): 1819, in cricket, from back (adj.) + stop (n.). In U.S. baseball, from 1889, "fence behind the catcher;" figurative extension to "catcher on a baseball team" is from 1890. The verb is attested from 1956 in the sense of "support." Related: Backstopped; backstopping.
backstory (n.): c. 1990, from background story.
backstreet (n.): mid-15c., from back (adj.) + street.
backstroke (n.): 1670s, "counter-punch," from back (adj.) + stroke (n.). From 1876 in swimming, from back (n.).
backtalk (n.): also back-talk, "impertinent retort," 1858, originally often used in literary attempts at low Irish idiom, from back (adj.) + talk (n.).
backtrack (v.): "retrace one's steps," figuratively, by 1896, from literal sense, with reference to hunted foxes, from back (adv.) + track (v.). Related: Backtracked; backtracking.
backup: see back up.
backward (adv.): c. 1300, from abakward, from Old English on bæc (see back (adv.)) + -weard adjectival and adverbial suffix (see -ward). Old English had the adverb bæcling. As an adjective, from 1550s. Meaning "behindhand with regard to progress" is first attested 1690s. To ring bells backward (from lowest to highest), c. 1500, was a signal of alarm for fire or invasion, or to express dismay. Another Middle English word for "backward, wrongly" was arseward (c. 1400); Old English had earsling.