Antonyms for the word "in mood" include "out of mood," "sad," "depressed," "distraught," "disheartened," "gloomy," "unhappy," "unenthusiastic," "dispassionate," and "apathetic." These words indicate a lack of emotional or mental energy, and are often associated with a feeling of hopelessness or despair. Conversely, antonyms for "in mood" can include "in high spirits," "elated," "excited," "energised," "enthusiastic," "euphoric," "jubilant," "joyful," "optimistic," and "upbeat." These express feelings of happiness, positivity, and hopefulness, and are often associated with a sense of purpose and vitality.