Becoming angry is an emotion that is experienced by many people. The crossword solutions for the term 'become angry' include 'BRISTLE', 'getmad', 'seered', 'getsore', 'flyoffthehandle', and 'getonesdanderup'. 'BRISTLE' is a verb meaning to become stiff or erect, usually in response to fear or anger. 'Getmad' is a verb meaning to become angry. 'Seered' is a verb meaning to become red with anger. 'Getsore' is a verb meaning to become angry or irritated. 'Flyoffthehandle' is an idiom meaning to become very angry suddenly. Lastly, 'getonesdanderup' is an idiom meaning to become angry or indignant.