Where does “mitigatable” come from?

mitigatable (English) comes from English able, from Middle English able, from Old French able, from Latin habilis, from Latin -ilis, from Proto-Italic -elis, from Proto-Indo-European -elis, from Proto-Indo-European -lós — Forms agent nouns from verbal roots.

Ancestry of “mitigatable”, step by step

mitigatable traces back through two separate lines of ancestry.

via English able

StepLanguageWordMeaning
1EnglishableEasy to use; Suitable; competent; Liable to
2Middle Englishablecapable, expert, qualified, skilful, competent
3Old Frenchableable; capable
4Latinhabilisable to have/possess/maintain; having sufficient...
5Latin-ilis-ile
6Proto-Italic-elis
7Proto-Indo-European-elis
8Proto-Indo-European-lósForms agent nouns from verbal roots

via English mitigate

StepLanguageWordMeaning
1EnglishmitigateTo reduce, lessen, or decrease; to make less...
2Latinmitigatussoftened, ripened, having been made tender;...
3LatinmitigoI make soft, ripe, or tender; I mitigate, make...
4LatinmitisMild, mellow, mature, ripe; sweet, juicy,...
5Proto-Indo-Europeanmeyh₁-mild, soft
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin habilis