Where does “inserviceable” come from?

inserviceable (English) comes from English serviceable, from Old French servisable, from Old French servise, from Latin servitium, from Latin -itia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs — Creates adjectives from noun or verb stems.

Ancestry of “inserviceable”, step by step

inserviceable traces back through two separate lines of ancestry.

via English serviceable

StepLanguageWordMeaning
1EnglishserviceableEasy to service; Repairable instead of...
2Old Frenchservisable
3Old Frenchserviseservice; servitude; vasselage; church service
4Latinservitiumslavery, servitude; slaves; service
5Latin-itia-ness, -ity
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or 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 -yós