English
improvisor
From improvise + -or.
Formed from improvise + -or
Proto-Indo-European *weyd- ‘to see’
…
Latin vīsus ‘having been seen’
Latin prōvīsus ‘foreseen’
Latin improvisus ‘unforeseen, unexpected’
French improviser ‘to improvise’
English improvise
Today it means
noun —
Language periods are conventional ranges, not dates for this word.
Etymograph / improvisor