adjective
easily excited
an excitable child who needs a firm hand
Synonyms: agitable, alarmable, combustible, edgy, skittery, skittish, startlish, volatile
Related Word: high-strung, mercurial, temperamental, unstable; touchy
Idioms: like a bundle of nerves, likely to go off at half cock, on edge, on the ragged edge
Contrasted words: calm, collected, cool, easy, easygoing, phlegmatic, placid, quiet
Antonyms: unexcitable