Where does “unflexibly” come from?

unflexibly (English) comes from English unflexible, from English flexible, from Middle French flexible, from Latin flexibilis, from Latin -bilis, from Proto-Italic -ðlis, from Proto-Indo-European -dʰlis, from Proto-Indo-European -dʰlom — Alternative form of *-trom; instrumental suffix;...

Ancestry of “unflexibly”, step by step

unflexibly traces back through two separate lines of ancestry.

via English unflexible

StepLanguageWordMeaning
1EnglishunflexibleNot flexible
2EnglishflexibleCapable of being flexed or bent without breaking;...
3Middle Frenchflexible
4Latinflexibilisflexible, pliant, able to be bent; tractable,...
5Latin-bilis-ble
6Proto-Italic-ðlisForms adjectives from verb stems indicating capacity or worth of being acted on
7Proto-Indo-European-dʰlis
8Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European -dʰlomEvery word from Latin -bilisEvery word from Latin flexibilis