Where does “thenable” come from?

thenable (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.

thenable (English): An object or function that exposes a then method returning a promise

Definitions

  1. An object or function that exposes a then method returning a promise

Ancestry of “thenable”, step by step

thenable 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 then

StepLanguageWordMeaning
1EnglishthenAt that time; Soon afterward; Next in order; in...
2GermanThontuna; Obsolete spelling of Ton which was...
3Frenchthontuna; an ugly woman
4Latinthunnustuna
5Ancient Greekθύννοςtuna
6Ancient Greekθύνωto rush along
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin habilis
thenable — Etymology, Origin & Word History | Etymology Explorer