cavity

n.洞, 腔

cauterize, cauterize, cauterise, caution, cautionary, cautious, cautiously, cautiousness, cavalcade, cavalier, cavalry, cave, cave in, cave-dweller, cave-in, caveat, caveman, cavern, cavernous, caviare (also caviar), cavil, cavity wall, cavort, caw, cayenne, cayman (also caiman), CB, CBC, CBE, CBI, CBS, cc, CD, CD-ROM, Cdr (also Cmdr), Cdre (also Cmdre), CDT, CE, cease, cease-fire, ceaseless,