"Don't" is a contraction of "do not." It is used as a negative auxiliary verb to form negative commands, requests, or prohibitions. The clue "___ forget ..." suggests that "dont" could possibly be "don't," meaning "do not."
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: "I forbid it". Explanations are generated by AI and may be inaccurate.