The antonyms for the word "excitable" are calm, composed, restrained, unexcitable, collected, impassive, indifferent, unemotional, and phlegmatic. While excitable refers to being easily aroused, agitated, or provoked, calm means to be peaceful, composed, and relaxed. If someone is excitable, they are likely to lose their cool, whereas restrained indicates control and moderation. Unexcitable refers to people who are not easily agitated, impassive refers to someone who is insusceptible to emotions, and indifferent means that one is apathetic or disinterested. Finally, phlegmatic refers to someone who is unemotional and not given to showing excitement.