Where does “unexplicability” come from?

unexplicability (English) comes from English unexplicable, from English inexplicable, from Middle English inexplicable, from Middle French inexplicable, from Latin inexplicabilis, from Latin explicabilis, from Latin -bilis, from Proto-Italic -ðlis — Alternative form of *-trom; instrumental suffix;...

Ancestry of “unexplicability”, step by step

unexplicability traces back through two separate lines of ancestry.

via English unexplicable

StepLanguageWordMeaning
1Englishunexplicable
2EnglishinexplicableImpossible to explain; not easily accounted for
3Middle Englishinexplicable
4Middle Frenchinexplicable
5Latininexplicabilisinexplicable
6Latinexplicabilisthat may be explained, explicable, explainable
7Latin-bilis-ble
8Proto-Italic-ðlisForms adjectives from verb stems indicating capacity or worth of being acted on
9Proto-Indo-European-dʰlis
10Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...

via English ability

StepLanguageWordMeaning
1EnglishabilitySuitableness; The quality or state of being able;...
2Middle Englishabilitesuitability, aptitude, ability
3Old Frenchableté
4Latinhabilitāsability, aptitude, fitness
5Latinhabilisable to have/possess/maintain; having sufficient...
6Latin-ilis-ile
7Proto-Italic-elis
8Proto-Indo-European-elis
9Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European -dʰlomEvery word from Latin -bilisEvery word from Latin explicabilis