"extemporizing" in the verb sense
1. improvise, extemporize
manage in a makeshift way do with whatever is at hand
"after the hurricane destroyed our house, we had to improvise for weeks"
2. improvise, improvize, ad-lib, extemporize, extemporise
perform without preparation
"he extemporized a speech at the wedding"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License