- holding tenaciously to a purpose, course of action, or opinion; resolute.
- stubborn or obstinate.
- extremely or objectionably persistent: a pertinacious salesman from whom I could not escape.
Origin of pertinacious
SynonymsSee more synonyms for pertinacious on Thesaurus.com
1. persevering. 2. dogged.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pertinaciously
Other substances he found that it would consume slowly, but pertinaciously.In the Morning of Time
Charles G. D. Roberts
"But I think that is hardly sufficient," said Mrs. Robarts, pertinaciously.Framley Parsonage
For a long time, and most pertinaciously, this idea dwelt with her.The Adventures of Harry Richmond, Complete
"Then I'll walk a few steps with you," he said pertinaciously.London's Heart
B. L. (Benjamin Leopold) Farjeon
If they are not defended perseveringly and pertinaciously, I will not combat them strongly.Commentary on Genesis, Vol. I
- doggedly resolute in purpose or belief; unyielding
- stubbornly persistent
C17: from Latin pertināx, from per- (intensive) + tenāx clinging, from tenēre to hold
Word Origin and History for pertinaciously
Online Etymology Dictionary, © 2010 Douglas Harper