The antonyms for the word "in tumescent" refer to the state of being reduced, small, or contracted. Some of the antonyms include shrunken, deflated, contracted, droopy, and flaccid. Each of these words describes a state opposite to "in tumescent," which refers to an enlarged, swollen, or erect state of an object, particularly the penis. These antonyms describe a non-aroused, non-stimulated, or non-erect state that often carries negative connotations, particularly in the context of sexual arousal. These words can also refer to a general loss of energy, strength, or vitality, both physically and emotionally.