Improviser (noun)

A person who improvises, especially in the performing arts.

Origin:

Late 16th century (as a verb in the sense 'act on impulse'): from french improviser, from italian improvvisare, based on latin improvisus 'unforeseen', from in- 'not' + provisus 'foreseen'. the noun use dates from the late 19th century.

Examples:

1. She was a talented improviser, able to make up funny stories on the spot.
2. He was a jazz musician known for his ability to improvise complex solos.
3. The improvisers were given a word and asked to act out a scene based on it.
4. The actor was nervous about performing in front of an audience, but he was a natural improviser.
5. The comedy troupe relied on their improviser's ability to come up with witty jokes on the fly.