improvise
im.pro.vise or im.pro.vi.sor \.im-pr*-'vi-z\ \-'vi--z*r\ vb [F improviser, fr. It improvvisare, fr. improvviso sudden, fr]. L improvisus, lit., unforeseen, fr. in- + provisus, pp. of provide-re to see ahead - more at PROVIDE 1: to compose, recite, or sing on the spur of the moment : EXTEMPORIZ E 2: to make, invent, or arrange offhand : to improvise something - im.pro.vi.ser n