extemporize: Meaning and Definition of

ex•tem•po•rize

1. to speak extemporaneously: He can extemporize on any of a number of subjects.
2. to sing, or play on an instrument, composing the music as one proceeds; improvise.
3. to do or manage something in a makeshift way.

1. to make or devise extempore.
2. to compose offhand; improvise.