say it: IM-pruh-vahyz
improvise is a verb meaning "perform without preparation". It carries 2 recorded senses.
manage in a makeshift way; do with whatever is at hand
“after the hurricane destroyed our house, we had to improvise for weeks”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for improvise come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.