inadeptness

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *ən- Latin in-bor. Middle English in- English in- Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad- Latin apiō Proto-Indo-European *-sḱéti Proto-Italic *-skō Latin -scō Latin apīscor Latin adipīscor Latin adeptusbor. French adeptebor. English adept English inadept Proto-Germanic *-ōną Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English inadeptness From inadept + -ness.

来源：wiktionary