The antonyms for becomes insane are varied and numerous. Some of the most commonly used antonyms include the words "sane", "stable", "sensible", "balanced", and "rational". Other antonyms may include the words "level-headed", "sober", "reasonable", "judicious", and "prudent". In general, the antonyms for the phrase "becomes insane" all represent an opposite state of mind or behavior, such as a sound mind, sensible behavior, and a rational thought process. These antonyms are important for helping to identify and describe different states of mental health and well-being, and for understanding the varied experiences of individuals who may be struggling with mental health issues.