culvert

n drain that crosses beneath a road, railway, etc; underground channel for electrical cables （公路、 铁路等的）涵洞; 地下电缆道.

culminate, culmination, culottes, culpability, culpable, culpably, culprit, cult, cultivable, cultivate, cultivated, cultivation, cultivator, cultural, culturally, culture, culture shock, culture vulture, cultured, cultured pearl, cum, cumbersome, cumin, cummerbund, cumulative, cumulatively, cumulus, cuneiform, cunnilingus, cunning, cunningly, cunt, cup, cup final (usu 通常作 Cup Final), cup-tie, cupboard, cupful, Cupid, cupidity, cupola,