The word "inexcitable" means calm and composed, but if we look for its antonyms, we will come across several opposite and contradictory words. The antonyms of "inexcitable" can be agitated, anxious, restless, jumpy, high-strung, excitable, nervous, and volatile. These adjectives indicate a state of being easily aroused and agitated, the opposite of inexcitable, which implies a state of emotional stability and control. Such words describe a character who is impulsive, moves rapidly from one emotion to another, and is unable to keep a cool head. Hence, the antonyms of "inexcitable" can portray a sharp contrast to the balanced and steady personality that inexcitable generally represents.