c.1050, cemes, from O.Fr., from L.L. camisia "shirt, tunic" (c.400 C.E.), first used as a soldier's word, probably via Gaulish, from P.Gmc. *khamithjan (cf. Ger. hemd "shirt"), from PIE base *kem- "to cover, cloak." The Fr. form took over after c.1200.