believability

Etymology tree
Proto-Indo-European *h₁ep-der.
Proto-Indo-European *h₁épsder.
Proto-Indo-European *h₁epider.
Proto-Indo-European *h₁pi
Proto-Germanic *bider.
Proto-Germanic *bi-
Proto-West Germanic *bi-
Proto-Indo-European *lewbʰ-der.
Proto-Germanic *laubō
Proto-Indo-European *-yéti
Proto-Germanic *-janą
Proto-Germanic *laubijaną
Proto-West Germanic *laubijan
Proto-West Germanic *bilaubijan
Old English belīefan
Middle English bileven
English believe
Proto-Indo-European *-dʰlom
Proto-Indo-European *-dʰlis
Proto-Italic *-ðlis
Latin -bilis
Latin -ābilis
Proto-Indo-European *-teh₂
Proto-Indo-European *-ts
Proto-Indo-European *-teh₂ts
Proto-Italic *-tāts
Latin -tās
Latin -abilitas
Middle French -abletébor.
Middle English -ablete
English -ability
English believability
From believe + -ability.