LATIN DICTIONARYLexicon Latīnum
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“stubborn” in Latin

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

stubborn
pertinax: pervicax: obstinatus: offirmatus: contumax [SYN. in OBSTINATE]: praefractus (not yielding): perversus (perverse, not so as it should be): difficilis: natura difficilis (obstinate, difficult to manage or to treat). (The words are found in this connection and order.) difficilis et morosus: ☞ refractarius and praefractus are entirely foreign to standard prose.

Quick answer

What is the Latin word for stubborn?
The usual Latin words for “stubborn” are pertināx, pervicāx, obstinō; also offirmō, contumāx, pervertō. 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.