cave

n.山洞, 洞穴"

caulk (also esp US calk), causal, causality, causation, causative, cause, causeway, caustic, caustic soda, caustically, cauterize, cauterize, cauterise, caution, cautionary, cautious, cautiously, cautiousness, cavalcade, cavalier, cavalry, cave in, cave-dweller, cave-in, caveat, caveman, cavern, cavernous, caviare (also caviar), cavil, cavity, cavity wall, cavort, caw, cayenne, cayman (also caiman), CB, CBC, CBE, CBI, CBS,