The phrase "lays a finger on" usually means to physically harm or touch someone in a negative way. There are various antonyms that can be used for this phrase, depending on the context. Some antonyms that can be used for "lays a finger on" are "protects", "helps", "respects", "cares", "aid", and "soothes". For example, instead of saying "He laid a finger on her", one could say "He protected her from harm". Similarly, instead of saying "She laid a finger on him", one could say "She respected his boundaries". Using antonyms for the phrase "lays a finger on" can help communicate positive actions and behaviors towards others.