英语词汇alternation的起源、历史背景-英语词源词典

词汇	alternation
词源	alternation n. "act of alternating; state of being alternate," mid-15c., alternacioun, from Old French alternacion "alternation," from Latin alternationem (nominative alternatio) "an interchanging," noun of action from past-participle stem of alternare "to do first one thing then the other; exchange parts," from alternus "one after the other, alternate, in turns, reciprocal," from alter "the other" (see alter). Entries linking to alternation alter v. late 14c., "to change (something), make different in some way," from Old French alterer "to change, alter," from Medieval Latin alterare "to change," from Latin alter "the other (of the two)," from PIE root *al- (1) "beyond" + comparative suffix -ter (as in other). Intransitive sense "to become otherwise" first recorded 1580s. Related: Altered; altering. updated on September 18, 2022
随便看	exclamatory exclude exclusion exclusionary exclusive exclusivity excommunicate excommunication excoriate excoriation excrement excrescence excrescent excrete excretion excretory excruciate excruciating exculpate exculpation exculpatory excursion excusable excusatory excuse

英语词源词典收录了45867条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。

alternation n.