Where does “witnessable” come from?

witnessable (English) comes from English Witness, from English -ness, from Middle English -nesse, from Old English -nes, from Proto-West Germanic -nassī, from Proto-Germanic -inassuz, from Proto-West Germanic -ī, from Proto-Germanic -į̄ — Creates collective nouns, which refer to groups...

witnessable (English): Capable of being witnessed; observable

Definitions

  1. Capable of being witnessed; observable

Ancestry of “witnessable”, step by step

witnessable traces back through two separate lines of ancestry.

via English Witness

StepLanguageWordMeaning
1EnglishWitnessJehovah's Witness
2English-nessAppended to adjectives to form nouns meaning "the...
3Middle English-nesseAffixed to adjectives to form abstract nouns...
4Old English-nesUsed to form abstract nouns, usually from...
5Proto-West Germanic-nassīUsed to form abstract nouns, usually from...
6Proto-Germanic-inassuz-ness
7Proto-West Germanic-ness, -th
8Proto-Germanic-į̄-th
9Proto-Indo-European-íh₂
10Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

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

Words derived from “witnessable

Every word from Proto-Indo-European -h₂Every word from English -nessEvery word from Old English -nes