Where does “decreasable” come from?

decreasable (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.

decreasable (English): Able to be decreased

Definitions

  1. Able to be decreased

Ancestry of “decreasable”, step by step

decreasable 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 decrease

StepLanguageWordMeaning
1EnglishdecreaseOf a quantity, to become smaller
2Middle Englishdecresen
3Middle EnglishdiscresenTo decrease in size, number, or extent
4Old Frenchdescreistreto decrease; to lessen; to diminish
5Latindecrēscere
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin habilis