pertinaciousa GRE synonym for 'persistent' meaning holding firmly to a purpose or belief with dogged resolveThe pertinacious lawyer filed appeal after appeal until the verdict was overturned.NoteThe pertinacious lawyer filed appeal after appeal until the verdict was overturned.Elon.io is an online learning platformWe have an entire course teaching GRE Verbal — Essential Vocabulary grammar and vocabulary.Start learning GRE Verbal — Essential Vocabulary now