"Kick the teeth" is a colloquial phrase that means to brutally defeat someone or something. Its antonyms could include "heal" or "mend." By healing or mending, one can restore and repair the damage that has been inflicted. Alternatively, the antonyms could be "spare" or "forgive." By sparing someone, they are not subjected to harsh treatment or punishment, while forgiveness involves withholding anger or resentment towards someone who has wronged you. Another antonym could be "embrace" or "accept." By embracing someone, you show kindness and love instead of brutality, and by accepting circumstances, you take them in their entirety without trying to change or harm them.