Here the word "it" refers to the lessons taught by the father and mother in [Proverbs 6:20](../06/20.md). Alternate translation: "It saves you from" or "It protects you from" (See: [[rc://en/ta/man/jit/figs-123person]])
The word "tongue" here is a metonym for the words the woman uses her tongue to speak. Alternate translation: "deceptive words" (See: [[rc://en/ta/man/jit/figs-metonymy]])