Antonyms for the phrase "curls one's lip at" can include adjectives like appreciative, accepting, and approving. Instead of showing disdain, disapproval, or dislike, these antonyms describe a positive attitude towards something or someone. Synonyms for appreciative can include grateful, thankful, or admiring while antonyms for accepting may include rejecting, resisting, or denying. Approving can be synonymous with endorsing, supporting, or encouraging while disapproving might feel similar to objecting, protesting, or challenging. Using these antonyms in place of "curls one's lip at" can help to convey a more positive sentiment or response to a particular situation or person.