frighten

vt.使惊吓，吓唬 vi.惊恐，害怕

friary, fricassee, fricative, friction, Friday, fridge, fridge-freezer, fried, friend, friendless, friendliness, friendly, friendly match (also friendly), friends, friendship, frieze, frig, frigate, frigging, fright, frightened, frightening, frighteningly, frightful, frightfully, frigid, frigidity, frigidly, frill, frilled, frilly, fringe, fringe benefit, frippery, Frisbee, frisk, friskily, frisky, frisson, fritter,