"improvised" in the verb sense
1. improvise, improvize, ad-lib, extemporize, extemporise
perform without preparation
"he extemporized a speech at the wedding"
2. 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"
"improvised" in the adjective sense
1. improvised, jury-rigged, makeshift
done or made using whatever is available
"crossed the river on improvised bridges"
"the survivors used jury-rigged fishing gear"
"the rock served as a makeshift hammer"
Source: WordNet® (An amazing lexical database of English)
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