IMPROVISATED

Verb

improvisated

simple past tense and past participle of improvisate

Source: Wiktionary

IMPROVISATE

Im*prov"i*sate, a. Etym: [See Improvise.]

Definition: Unpremeditated; impromptu; extempore. [R.]

Im*prov"i*sate, v. t. & i. [imp. & p. p. Improvisated; p. pr. & vb. n. Improvisating.]

Definition: To improvise; to extemporize.

Source: Webster’s Unabridged Dictionary 1913 Edition