Antonyms for "freak out on" could be "calm down," "relax," "compose oneself," "maintain composure," or "stay grounded." These words imply a sense of control and peace rather than a loss of control or panic. Other antonyms include "detached," "dispassionate," "unconcerned," and "indifferent," suggesting a lack of emotional investment or intensity. In contrast to "freak out on," these antonyms emphasize a sense of rationality and level-headedness rather than impulsivity or irrationality. By using these antonyms, we can communicate a message of serenity and control even in situations that might otherwise provoke intense emotions.