improvise means to make something up or invent it as one goes on; to proceed guided only by imagination, intuition, and guesswork rather than by a careful plan. Lexicurio rates it Distinctive — a strength score of 65 out of 100.
improvise is pronounced /ˈɪm.pɹə.vaɪz/.
Etymology
From French improviser; ultimately from Latin improvisus.
verb
- To make something up or invent it as one goes on; to proceed guided only by imagination, intuition, and guesswork rather than by a careful plan.“He had no speech prepared, so he improvised.”