frivolity

n 1 [U] frivolous behaviour 轻浮的举止: youthful frivolity 年轻人的心浮气躁. 2 [C usu pl 通常作复数] frivolous activity or comment 无聊的活动或议论: I can't waste time on such frivolities. 我不能在这种无聊的事情上浪费时间.

frightened, frightening, frighteningly, frightful, frightfully, frigid, frigidity, frigidly, frill, frilled, frilly, fringe, fringe benefit, frippery, Frisbee, frisk, friskily, frisky, frisson, fritter, frivolous, frivolously, frizz, frizzle, frizzy, fro, frock, frock coat, frock-coat, frog, frog-march, frog-spawn, frogman, frolic, frolicsome, from, from memory, from now on, from side to side, from then on,