PERTINACIOUS /ˌpɜːtɪˈneɪʃəs/ Scrabble 16 Words With Friends 20 Definition adjective stubbornly unyielding. — synonyms: dogged, dour, persistent, tenacious, unyielding See all 2185 words you can make from PERTINACIOUS → 12-letter words Words starting with P Words ending with S ← Unscramble different letters