"to wish or long for, express a wish to obtain," c. 1200, desiren, from Old French desirrer (12c.) "wish, desire, long for," from Latin desiderare "long for, wish for; demand, expect," the original sense perhaps being "await what the stars will bring," from the phrase de sidere "from the stars," from sidus (genitive sideris) "heavenly body, star, constellation" (but see consider). Related: Desired; desiring.
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.