Etymology
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option (n.)

c. 1600, "action of choosing;" 1630s, "power or liberty of choosing," from French option (Old French opcion), from Latin optionem (nominative optio) "choice, free choice, liberty to choose," from optare "to desire, pray for, choose," which is of uncertain origin. De Vaan derives it from Proto-Italic *opeje- "to choose, grab," from PIE *hopeie- "to choose, grab," and compares Hittite epp/app- "to take, grab," Sanskrit apa, Avestan apa "has reached."

The meaning "thing that may be chosen" is attested from 1885. The commercial transaction sense of "privilege secured by payment of a premium (on a stock or a certain produce at a specified time and at a specified price)" is recorded from 1755 (the verb in this sense is attested by 1880 in American English). As a North American football play in which the back may either pass the ball or run with it, it is recorded by 1953.

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optional (adj.)

"depending on preference," hence "that may be done or not done according to one's choice," 1765, from option + -al (1).

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cooptation (n.)

also co-optation, 1530s, "choice, selection, mutual choice, election to fill a vacancy" on a committee, board, or society, from Latin cooptationem (nominative cooptatio) "election," noun of action from past-participle stem of cooptare "to elect, to choose as a colleague or member of one's tribe," from assimilated form of com "with, together" (see com-) + optare "choose" (see option (n.)). Related: Cooptative.

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opt (v.)

"wish for, choose, desire," 1877, from French opter "to choose" (16c.), from Latin optare "choose, desire" (see option). For the first few years only in English in a French context. An earlier word for the same thing was optate (1610s), from Latin optatus. To opt out "choose not to participate" is by 1922. Related: Opted; opting.

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optative (n.)

mid-15c., optatif, "the optative mood," in grammar, a form of a verb expressing wish or desire, from Old French optatif (15c.), from Late Latin optativus, from Latin optatus "wished, desired, longed for," past participle of optare "to choose, wish, desire" (see option). Also mid-15c. as an adjective, "expressing wish or desire by a distinct grammatical form." The general adjectival sense of "expressing or expressive of desire or wish" is by 1610s.

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opine (v.)

mid-15c., opinen, "express an opinion or opinions; to think, suppose," also transitive, "be of the opinion that," from Old French oppiner, opiner (15c.) and directly from Latin opinari "have an opinion, be of opinion, suppose, conjecture, think, judge," which is of unknown origin. It is traditionally considered to be related to optare "to desire, choose" (see option), but de Vaan's sources find the evidence of this weak. Related: Opined; opining.

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adoption (n.)

mid-14c., from Old French adopcion or directly from Late Latin adoptionem (nominative adoptio) "a taking as one's child," shorter form of adoptatio, noun of action from past-participle stem of Latin adoptare "chose for oneself, take by choice, select, adopt," especially "to take into a family, adopt as a child," from ad "to" (see ad-) + optare "choose, wish, desire," from PIE root *op- (2) "to choose" (see option (n.)).

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adopt (v.)

c. 1500, a back-formation from adoption or else from Old French adopter (14c.) or directly from Latin adoptare "chose for oneself, take by choice, select, adopt," especially "to take into a family, adopt as a child," from ad "to" (see ad-) + optare "choose, wish, desire" (see option (n.)). Originally in English also of friends, fathers, citizens, etc. Sense of "to legally take as one's own child" and that of "to embrace, espouse" a practice, method, etc. are from c. 1600. Related: Adopted; adopting.

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co-opt (v.)

1650s, "to select (someone) for a group or club by a vote of members," from Latin cooptare "to elect, to choose as a colleague or member of one's tribe," from assimilated form of com- "together" (see com-) + optare "choose" (see option (n.)). For some reason this defied the usual pattern of Latin-to-English adaptation, which should have yielded co-optate (which is attested from 1620s but now is rare or obsolete). Sense of "take over" is first recorded c. 1953. Related: Co-opted; co-opting.

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opinion (n.)

early 14c., opinioun, "a judgment formed or a conclusion reached, especially one based on evidence that does not produce knowledge or certainty," from Old French opinion "opinion, view, judgements founded upon probabilities" (12c.), from Latin opinionem (nominative opinio) "opinion, conjecture, fancy, belief, what one thinks; appreciation, esteem," from stem of opinari "think, judge, suppose, opine," from PIE *op- (2) "to choose" (see option).

Where there is much desire to learn, there of necessity will be much arguing, much writing, many opinions; for opinion in good men is but knowledge in the making. [Milton, "Areopagitica"]

The word always has tended toward "a judgment or view regarded as influenced more by sentiment or feeling than reason." The meaning "formal statement by a judge or other professional" is from late 15c. The specific sense of "the estimate one forms of the character or qualities of persons or things" is by c. 1500. Public opinion, "the prevailing view in a given community on any matter of general interest or concern," is by 1735.

Middle English, perhaps reflecting the era's concern for obtaining knowledge through learned disputation, had opinional "characterized by likelihood rather than certainty" and opinial "based on probable but not certain evidence" (both mid-15c.).

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