The antonyms for the word "more unexcitable" could include "animated," "excitable," "passionate," or "emotional." These words connote a level of energy and enthusiasm, while "more unexcitable" suggests a more measured, calm demeanor. Other antonyms could be "volatile," "impatient," "restless," or "high-strung," all of which emphasize a lack of stability or a tendency toward impulsivity, which are the opposite of being unexcitable. Ultimately, the choice of antonym depends on the context in which "more unexcitable" is being used, as well as the connotations the writer or speaker hopes to convey.