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rebate [rebate 词源字典]: rebate: [15] A rebate is etymologically an amount that has been ‘re-abated’. The word, originally a verb, comes from Old French rabattre ‘beat down again’, hence ‘reduce’, a compound formed from the prefix re- ‘again’ and abattre ‘beat down’ (source of English abate [13], and also of abattoir [19], euphemistically a place where animals are ‘beaten down’ or killed). This in turn went back to Vulgar Latin *abbattuere, a compound verb formed from the prefix ad- ‘completely’ and battuere ‘beat’ (source of English battle, combat, etc).
=> abate, abattoir, battle, combat[rebate etymology, rebate origin, 英语词源]
bareback (adj.): 1560s, of riding, from bare (adj.) + back (n.).
fireball (n.): also fire-ball, 1550s, from fire (n.) + ball (n.1).
rebar (n.): also re-bar, "steel reinforcing rod in concrete," 1961, from re(inforced) bar.
rebarbative (adj.): "repellent, unattractive," 1885, from French rébarbatif (14c.), from barbe "beard," from Latin barba (see barb (n.)).
rebate (v.): late 14c., "to reduce;" early 15c., "to deduct, subtract," from Old French rabattre "beat down, drive back," also "deduct," from re- "repeatedly" (see re-) + abattre "beat down" (see abate). Meaning "to pay back (a sum) as a rebate" is from 1957. Related: Rebated; rebating.
rebate (n.): 1650s, from rebate (v.).