- cost
- c.1200, from O.Fr. coster, from V.L. *costare, from L. constare "to stand at" (or with), from com- "with" + stare "to stand," from PIE base *sta- "to stand" (see stet). The idiom is the same one we use in Mod.E. when we say something "stands at X dollars" to mean it sells for X dollars. Cost effective (also cost effective) attested from 1967.