subway

n.地铁；地下人行道

subtitle, subtle, subtlety, subtly, subtopia, subtopic, subtotal, subtract, subtraction, subtropical, suburb, suburban, suburbanite, Suburbia, subvention, subversion, subversive, subversively, subversiveness, subvert, subzero, succeed, succeed in, succeed in doing, succeed in sth., success, successful, successfully, succession, successive, successively, successor, succinct, succinctly, succinctness, succor, succour, succour (US succor), succubus, succulence,