fair (adj.) Look up fair at Dictionary.com
O.E. fęger "beautiful, pleasant," from P.Gmc. *fagraz (cf. O.N. fagr, O.H.G. fagar "beautiful," Goth. fagrs "fit"), from PIE *fag-. The meaning in reference to weather (c.1200) preserves the original sense (opposed to foul). Sense of "light complexioned" (1550s) reflects tastes in beauty; sense of "free from bias" (mid-14c.) evolved from another early meaning, "morally pure, unblemished" (late 12c.). The sporting senses (fair ball, fair catch etc.) began in 1856. Fair play is from 1590s; fair and square is from c.1600. Fair-haired in the figurative sense of "darling, favorite" is from 1909. First record of fair-weather friends is from 1736.
fair (n.) Look up fair at Dictionary.com
early 14c., from Anglo-Fr. feyre (late 13c.), from O.Fr. feire, from V.L. *feria "holiday, market fair," from L. ferię "religious festival, holiday" (see feast).