early 13c., from Anglo-Fr. and O.N.Fr. veil (O.Fr. voile) "a head-covering," also "a sail," from L. vela, pl. of velum "sail, curtain, covering," from PIE base *weg- "to weave." Vela was mistaken in V.L. for a fem. sing. noun. The verb (1382) is from O.Fr. veler, voiller, from L. velare "to cover, veil," from velum. Figurative sense of "to conceal" (something immaterial) is recorded from 1530s. To take the veil "become a nun" is attested from early 14c.