extemporize

Verb

• manage in a makeshift way; do with whatever is at hand
• perform without preparation
  • "he extemporized a speech at the wedding"
• To perform or speak without prior planning or thought; to act in an impromptu manner; to improvise.
• To adapt, improvise, or devise action or speech in an impromptu or spontaneous manner.

Synonyms

ad-lib, extemporise, improvise, improvize, devise, think on one's feet

Related Words

extemporaneous, extempore, extemporisation, extemporization, off the cuff, off the top of one's head, play it by ear