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Origin and history of alternate

alternate(adj.)

"following each other by turns, reciprocal," 1510s, from Latin alternatus "one after the other," past participle 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).

Alternate means "by turns;" alternative means "offering a choice." Both imply two kinds or things. Alternation is the process of two things following one another regularly by turns (as night and day); an alternative is a choice of two things, the acceptance of one implying the rejection of the other. Related: Alternacy.

alternate(v.)

1590s, "do by turns" (transitive), from Latin alternatus, past participle of alternare "do one thing and then another, do by turns," from alternus "one after the other, alternate, in turns, reciprocal," from alter "the other" (see alter). Replaced Middle English alternen "to vary, alternate" (early 15c.). Transitive meaning "interchange reciprocally" is from 1850; intransitive sense "follow one another in time or place" is from c. 1700; that of "pass back and forth between actions, conditions, etc." is by 1823. Related: Alternated; alternating.

alternate(n.)

1718, "that which alternates (with anything else)," from alternate (adj.). Meaning "a substitute, one authorized to take the place of another," especially in political bodies, is first attested 1848.

Entries linking to alternate

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.

1550s, "occurring or acting by turns, one after the other," present-participle adjective from alternate (v.). Electrical alternating current is recorded from 1839, an electrical current which flows alternately in opposite directions without interruption.

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