Amorous

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Middle English: via Old French from medieval Latin amorosus, from Latin amor ‘love’.

wiktionary

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From Middle English amorous, amerous (14th century), from Old French amoros, amoreus, from Medieval Latin amōrōsus, from Latin amor(“love”), related to amāre(“to love”). Compare French amoureux(“in love”).

etymonline

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amorous (adj.)

c. 1300, "in love; inclined to love; sexually attracted," from Old French amoros "loving, in love; lovely" (13c., Modern French amoureux), from Late Latin amorosum, from Latin amor "love, affection, strong friendly feeling; one's beloved," from amare "to love, be in love with; find pleasure in" (see Amy). Related: Amorously; amorousness.