Where does “unspeakable” come from?

unspeakable (Scots) comes from Scots 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.

unspeakable (Scots): unspeakable

Definitions

  1. unspeakable

Ancestry of “unspeakable”, step by step

unspeakable traces back through two separate lines of ancestry.

via Scots able

StepLanguageWordMeaning
1Scotsableable, substantial, physically fit, strong,...
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 Scots speak

StepLanguageWordMeaning
1Scotsspeakto speak
2Old Englishsprecanto speak, talk
3Proto-West Germanic*sprekanto speak
4Proto-Germanicsprekanąto speak, to make a noise
5Proto-Indo-Europeanspreg-to make a sound, speak; to make a sound, utter,...
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin habilis