The phrase "curled one's lip" refers to a facial expression that conveys contempt or disgust, usually achieved by raising one side of the upper lip. Some antonyms for this phrase could include "smiled warmly," "grinned broadly," or "beamed with delight." These expressions convey positive emotions such as happiness, joy, or amusement. Other antonyms might include "raised an eyebrow in surprise," "furrowed one's brow in confusion," or "blinked in disbelief." These expressions convey neutral or mixed emotions, indicating that the speaker is unsure or surprised by what they are seeing or hearing.
