The term 'show indignation' can be summarized by three crossword solutions: BRIDLE, RAVE, and RANT. BRIDLE is a verb meaning to restrain or control, usually with a harness or rope. RAVE is an intense expression of enthusiasm or admiration, often in an unrestrained manner. RANT is an angry, violent speech, usually full of complaints and accusations. Together, these words suggest that showing indignation involves restraining one's anger while expressing it in an intense and passionate way.