subzero

adj (of temperatures) below zero （指温度）零度以下的: the ,subzero `temperaturesof a Siberian winter 西伯利亚冬季的零下气温.

subtle, subtlety, subtly, subtopia, subtopic, subtotal, subtract, subtraction, subtropical, suburb, suburban, suburbanite, Suburbia, subvention, subversion, subversive, subversively, subversiveness, subvert, subway, 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, succulent,