The words "dumb trick" can be antonyms themselves as "dumb" denotes lack of intelligence or understanding, whereas "trick" implies cleverness or deception. However, there are several antonyms for this phrase such as "wise plan," "smart move," "intelligent decision," and "clever strategy." These antonyms suggest the use of intelligence, knowledge, and wisdom in making decisions or taking actions, rather than impulsiveness or foolishness. Using antonyms like these can help reframe a situation and encourage critical thinking in the face of challenges or obstacles.