Where does “indivinable” come from?

indivinable (English) comes from English divinable, from English divine, from Middle French deviner, from Latin divino, from Latin dīvīnus, from Latin dīvus, from Old Latin deivos, from Proto-Italic deiwos — to be bright; sky, heaven.

Ancestry of “indivinable”, step by step

indivinable traces back through two separate lines of ancestry.

via English divinable

StepLanguageWordMeaning
1EnglishdivinableThat can be guessed
2EnglishdivineOf or pertaining to a god; Eternal, holy, or...
3Middle Frenchdeviner
4LatindivinoI foresee, foretell, divine; I prophesy; I guess
5Latindīvīnusdivine, of a deity, superhuman, supernatural
6Latindīvusof or belonging to a deity; divine
7Old Latindeivosgod, deity
8Proto-Italicdeiwosgod, deity
9Proto-Indo-Europeandeywósgod
10Proto-Indo-Europeandyew-to be bright; sky, heaven

via English in

StepLanguageWordMeaning
1EnglishinUsed to indicate location, inclusion, or position...
2Middle EnglishinAny kind of accomodation; particularly; A home or...
3Old Englishinin; Alternative form of inn
4Proto-West Germanic*in
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European deywósEvery word from Proto-Italic deiwos