The story
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Italic*kaussā
- Old Latincaussa
- Latincausa
- Latinaccūsō
- Latinaccūsātor
- Old Frenchaccusour
- Middle Englishacuser
- English todayaccuser
Inherited from Middle English acuser, accusour, borrowed from Old French accusour, from Latin accūsātor, from accūsāre. Equivalent to accuse + -er. Doublet of accusator.
Etymology from Wiktionary, CC BY-SA 4.0.