不愉快的事
Unpleasant \Un*pleas"ant\, a. Not pleasant; not amiable or agreeable; displeasing; offensive. -- {Un*pleas"ant*ly}, adv. -- {Un*pleas"ant*ness}, n.
unpleasantness n 1: the feeling caused by disagreeable stimuli; one pole of a continuum of states of feeling [ant: {pleasantness}] 2: the quality of giving displeasure; "the recent unpleasantness of the weather" [ant: {pleasantness}]