Where does “sightable” come from?

sightable (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.

sightable (English): Capable of being sighted; visible from a vantage...

Definitions

  1. Capable of being sighted; visible from a vantage...

Ancestry of “sightable”, step by step

sightable 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 sight

StepLanguageWordMeaning
1EnglishsightThe ability to see; The act of seeing; perception...
2Middle Englishsightesight
3Middle Englishsiken
4Old Englishsīcanto sigh
5Proto-West Germanic*sīkanto sigh, take a deep breath
Every word from Proto-Indo-European -lósEvery word from Latin -ilisEvery word from Latin habilis