Antonyms for "putting foot in" could include being tactful or diplomatic. It involves treating others with respect and kindness, avoiding actions or statements that could be perceived as offensive, thoughtless or rude. Another antonym could be exhibiting restraint and self-control, weighing your words, and actions carefully and refraining from acting impulsively or recklessly. It also requires empathy and sensitivity towards others, considering their perspective and feelings while communicating. Being aware of social norms, values, and etiquette, while in conversation, can also help in avoiding situations of "putting foot in". In conclusion, being considerate, tactful, and understanding are the antonyms of "putting foot in".