improvise

v. t. [ imp. & p. p. Improvised p. pr. & vb. n. Improvising. ] [ F. improviser, it. improvvisare, fr. improvviso unprovided, sudden, extempore, L. improvisus; pref. im- not + provisus foreseen, provided. See Proviso. ] 1. To compose, recite, or sing extemporaneously, especially in verse; to extemporize; also, to play upon an instrument, or to act, extemporaneously. [ 1913 Webster ]

2. To bring about, arrange, do, or make, immediately or on short notice, without previous preparation and with no known precedent as a guide. [ 1913 Webster +PJC ]

Charles attempted to improvise a peace. Motley. [ 1913 Webster ]

3. To invent, or provide, offhand, or on the spur of the moment; as, he improvised a hammer out of a stone. [ 1913 Webster ]

v. i. To produce or render extemporaneous compositions, especially in verse or in music, without previous preparation; hence, to do anything offhand. [ 1913 Webster ]