The phrase "put one's foot down" refers to taking a firm stance or making a decisive decision. Its antonyms, or opposite meanings, include being indecisive, wishy-washy, or passive. If someone is wishy-washy, they may hesitate to take a strong position or make a decision, often resulting in a lack of progress. Being passive means not taking action or allowing things to happen without resistance. In contrast, being assertive suggests a confident and determined approach to addressing decision-making situations. Ultimately, while "putting one's foot down" implies taking control, its antonyms suggest the opposite, such as being hesitant, wishy-washy, or passive.