LATIN DICTIONARYLexicon Latīnum
English → Latin

“protest” in Latin

The English word protest itself goes back to Latin testis, through prōtestor.

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

protest s.
interpellatio (PROP., an interrupting of a person speaking): intercessio (especially before a higher power; e.g., by the tribunes). To enter a protest, intercedere; intercessionem facere; interpellere or interpellatione impedire aliquid; intercedere alicui rei.
Of a bill of exchange, *syngraphae rejectio.
protest v.
To make a protest, intercedere; intercessionem facere (to enter a protest); against anything, alicui rei intercedere; vetare, with an accusative and infinitive; aliquid deprecari, or recusare (to refuse vehemently).
To affirm strongly, declare solemnly, asseverare (the proper word): testari (as witness, to testify): affirmare, confirmare (to declare strongly): adjurare (upon oath): to protest on oath, polliceri et jurejurando confirmare (Caes.). To protest by the gods, testari, obtestari deos; per omnes deos adjurare: to protest most strongly, firmissime asseverare; omni asseveratione affirmare.
Of a bill of exchange, *syngrapham non expensam ferre; *synprapham non recipere.

Quick answer

What is the Latin word for protest?
The usual Latin words for “protest” are interpellātiō, intercessiō, intercēdō; also interpellō, assevērō, testor. 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.