Where does “indeducible” come from?

indeducible (English) comes from English deducible, from English -ible, from English -ity, from Middle English -ite, from Old French -ité, from Latin -itās, from Proto-Indo-European -teh₂ts, from Proto-Indo-European -teh₂ — Creates verbal adjectives from verb stems.

Ancestry of “indeducible”, step by step

indeducible traces back through two separate lines of ancestry.

via English deducible

StepLanguageWordMeaning
1EnglishdeducibleCapable of being deduced
2English-ibleAn adjective suffix, now usually in a passive...
3English-ityUsed to form a noun from an adjective;...
4Middle English-ite
5Old French-ité-ity
6Latin-itās
7Proto-Indo-European-teh₂tsUsed to form nouns representing state of being
8Proto-Indo-European-teh₂Used to form nouns representing state of being
9Proto-Indo-European-tósCreates verbal adjectives from verb stems

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 -tós