Opt

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late 19th century: from French opter, from Latin optare ‘choose, wish’.

wiktionary

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From French opter, from Latin optare “to choose” or "to select"

etymonline

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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.