Where does “unvigorous” come from?

unvigorous (English) comes from English vigorous, from Old French vigrus, from Old French vigoros, from Latin vigorosus, from Latin vigor, from Latin -or, from Proto-Italic -ōs, from Proto-Indo-European -ōs — Creates action nouns or result nouns from verbs;...

unvigorous (English): Not vigorous

Definitions

  1. Not vigorous

Ancestry of “unvigorous”, step by step

unvigorous traces back through two separate lines of ancestry.

via English vigorous

StepLanguageWordMeaning
1EnglishvigorousPhysically strong and active; Mentally strong and...
2Old Frenchvigrusstrong; hardy
3Old Frenchvigoros
4Latinvigorosus
5Latinvigorvigor, liveliness, activity; power, strength
6Latin-orused to form a third-declension masculine...
7Proto-Italic-ōsCreates masculine action nouns or result nouns...
8Proto-Indo-European-ōsCreates masculine and feminine action nouns or...
9Proto-Indo-European-oss
10Proto-Indo-European-osCreates action nouns or result nouns from verbs;...

via English un

StepLanguageWordMeaning
1EnglishunOne

Words derived from “unvigorous

Every word from Proto-Indo-European -osEvery word from Latin -orEvery word from Latin vigor
unvigorous — Etymology, Origin & Word History | Etymology Explorer