sad

a.悲伤的，忧愁的

sack-race, sackcloth, sackful, sacking, sacrament, sacramental, sacred, sacredly, sacredness, sacrifice, sacrifice sth. for, sacrifice to, sacrificial, sacrificially, sacrilege, sacrilegious, sacrilegiously, sacristan, sacristy, sacrosanct, sadden, saddle, saddle stitching, saddle-bag, saddle-sore, saddler, saddlery, sadhu, sadism, sadist, sadistic, sadistically, sadly, sadness, sado-masochism, sado-masochist, sae, safari, safari park, safari suit,