cavern

n.(尤指大的)洞穴，山洞

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