extemporise ( synonym found)
Definition of extemporise:

°To do something, particularly to perform or speak, without prior planning or thought; to act in an impromptu manner; to improvise.
°To do something in a makeshift way.
Definition of extemporise:

°To do something, particularly to perform or speak, without prior planning or thought; to act in an impromptu manner; to improvise.
°To do something in a makeshift way.
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