The term 'put your foot down' is an idiom that means to take a firm stance on something and not back down. The crossword solutions for this term are STOMP (5 letters), STEP (4 letters), and INSIST (6 letters). Stomping one's foot is a physical gesture of determination and strength, while stepping can be seen as a more subtle way of asserting oneself. Insisting is a verbal way of expressing one's will and making it known that one will not back down. All three words can be used to describe the same concept of taking a firm stance on something.