sadness

n.悲伤，忧伤

sacrilege, sacrilegious, sacrilegiously, sacristan, sacristy, sacrosanct, sad, sadden, saddle, saddle stitching, saddle-bag, saddle-sore, saddler, saddlery, sadhu, sadism, sadist, sadistic, sadistically, sadly, sado-masochism, sado-masochist, sae, safari, safari park, safari suit, safe, safe conduct, safe deposit (US ,safe deposit), safe house, safe seat, safeguard, safekeeping, safely, safety, safety curtain, safety glass, safety island (also `safety zone), safety lamp, safety match,