LATIN DICTIONARYLexicon Latīnum
English → Latin

“accessory” in Latin

The English word accessory itself goes back to Latin accēdō, through accessōrius.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

accessory s.
alicujus rei or alicui rei affinis (e.g., facinori, noxae, etc.): conscius: correus (a legal term for one put on his trial at the same time on the same charge, Ulp.): particeps alicujus rei (e.g., conjurationis): socius (e.g., sceleris). These words do not express an accessory as opposed to a principal.

Quick answer

What is the Latin word for accessory?
The usual Latin words for “accessory” are cōnscius, correus, socius; also facinus, noxa, coniūrātiō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.