Word Origin & History
O.E. lufu "love, affection, friendliness," from P.Gmc. *lubo (cf. O.Fris. liaf, Ger. lieb, Goth. liufs "dear, beloved;" not found elsewhere as a noun, except O.H.G. luba, Ger. Liebe), from PIE *leubh- "to care, desire, love" (cf. L. lubet, later libet "pleases;" Skt. lubhyati "desires;" O.C.S. l'ubu
"dear, beloved;" Lith. liaupse "song of praise"). Meaning "a beloved person" is from early 13c. The sense "no score" (in tennis, etc.) is 1742, from the notion of "playing for love," i.e. "for nothing" (1670s). Love-letter is attested from mid-13c.; love-song from early 14c. To be in love with (someone) is from c.1500. Love life "one's collective amorous activities" is from 1919, originally a term in psychological jargon. Love affair is from 1590s. Phrase for love or money "for anything" is attested from 1580s. To fall in love is attested from early 15c. The phrase no love lost (between two people) is ambiguous and was used 17c. in ref. to two who love each other well (c.1640) as well as two who have no love for each other (1620s).
O.E. lufian, from P.Gmc. *lubojanan, from root of love
(n.). Love-hate (adj.) "ambivalent" is from 1937, originally a term in psychological jargon.