Clavis | Webster's Dictionary of the English Language

clavis
clāvis (clāves, acc. to Pompon. Comment. p. 459), is, f. (acc. commonly clavem, clavim, Plaut. Mos...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
clavis
clāvis is (abl.vī or ve), f CLAV-, a key : horreorum claves: clavīs portis imposuit, L.: portarum,...

An Elementary Latin Dictionary