unaccessory

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Medieval Latin ad- Proto-Italic *kezdō Medieval Latin cēdō Medieval Latin accēdō Proto-Indo-European *-tōr Proto-Italic *-tōr Medieval Latin -tor Medieval Latin accessor Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Medieval Latin -ius Medieval Latin accessōriusbor. English accessory English unaccessory From un- + accessory.

来源：wiktionary