subtract的词源

英文词源

subtract

subtract: [16] To subtract something is etymologically to ‘pull it away’. The word comes from subtractus, the past participle of Latin subtrahere ‘pull away’. This was a compound verb formed from the prefix sub-, usually ‘under’ but here used in the sense ‘away’, and trahere ‘pull’ (source of English traction, tractor, trait, etc). The strictly mathematical use of the word is a post-Latin development.
=> contract, retract, traction, tractor, trait

subtract (v.)

1530s, "withdraw, withhold, take away, deduct," a back-formation from subtraction (q.v.), or else from Latin subtractus, past participle of subtrahere "take away, draw off." Related: Subtracted; subtracting. Mathematical calculation sense is from 1550s. Earlier verb form was subtraien (early 15c. in the mathematical sense), which is directly from the Latin verb.

Here he teches þe Craft how þou schalt know, whan þou hast subtrayd, wheþer þou hast wel ydo or no. ["Craft of Numbering," c. 1425]

中文词源

subtract：减

英语的“减”叫subtract，来自拉丁语的subtractus；sub即“away”；tractus “taken, pull”。“减”就是“take away（去掉）”。

该词的英语词源请访问找单词词源英文版：subtract 词源，subtract 含义。

subtract：减去；扣除

词根词缀： sub-下 + -tract-拉 → 拉下去 → 减去

subtract：减

sub-,在下，向下，-tract,拉，词源同 attract,contract.引申数学名词减，减去。