The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Italic*kaussā
- Old Latincaussa
- Latincausa
- Latinaccūsō
- Latinaccūsātor
- Latinaccūsātōrius
- Middle Frenchaccusatorie
- Latinaccūsātōrius
- Middle Englishaccusatorie
- Englishaccusatory
- English todayunaccusatory
From un- + accusatory.
Etymology from Wiktionary, CC BY-SA 4.0.