Where does “improvisor” come from?

improvisor (English) comes from English OR, from Middle English ōr, from Middle French or, from Old French or, from Latin aurum, from Latin ausum, from Latin ausus, from Latin audeō.

Ancestry of “improvisor”, step by step

improvisor traces back through two separate lines of ancestry.

via English OR

StepLanguageWordMeaning
1EnglishORInclusive or; either one proposition or the other...
2Middle Englishōror
3Middle Frenchorgold
4Old Frenchorgold; blond color; Alternative form of ore
5Latinaurumgold; any object made of gold, such as a gold...
6Latinausumnominative neuter singular of ausus; accusative...
7Latinaususdared, having dared, ventured, having ventured,...
8Latinaudeōto dare, venture, risk
9LatinavidusGreedy, avaricious, covetous; Eager,...
10Latin-idustending to
11Proto-Italic*-iðos

via English improvise

StepLanguageWordMeaning
1EnglishimproviseTo make something up or invent it as one goes on;...
2Frenchimproviserto improvise
3Italianimprovvisareto improvise, to extemporize, to make up, to play...
4Italianimprovvisounexpected, sudden, unforeseen, untimely;...
5Latinimprovisusunforeseen, unexpected; sudden
6Latinīn-un-, non-, not
7Latinînin, at, on, upon, from (space)
8Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
9Proto-Italicenin
10Proto-Indo-Europeanh₁énin
Every word from Proto-Italic *-iðos