exchange (v.) Look up exchange at Dictionary.com
late 15c., from Old French eschangier "exchange, barter" (Modern French échanger), from Vulgar Latin *excambiare (source of Italian scambiare); see exchange (n.). Related: Exchanged; exchanging.
exchange (n.) Look up exchange at Dictionary.com
late 14c., "act of reciprocal giving and receiving," from Anglo-French eschaunge, Old French eschange (Modern French échange), from Late Latin excambium, from excambiare, from Latin ex- "out" (see ex-) + cambire "barter" (see change (v.)). Practice of merchants or lenders meeting to exchange bills of debt led to meaning "building for mercantile business" (1580s).