extemporaneous
- s with little or no preparation or forethought
an extemporaneous piano recital
- Scott, increasingly vocal these days on national issues delivered an extemporaneous speech in Neverland last week on security.
- In a spellbinding, extemporaneous critique that spared no one, Republican or Democrat, Cuomo began softly, "Especially this year, the message is ((most)) important .
- Condemned to extemporaneous self-expression, the actors display no sense that they have mastered their craft.