- 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 on Thesaurus.com
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Related Wordsstrictly, stubbornly, resolutely, doggedly, steadfastly, staunchly, persistently, tenaciously, adamantly, decisively, unwaveringly, firmly, inflexibly, unreasonably, contumaciously, determinedly, fixedly, indomitably, intractably, pertinaciously
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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for pertinaciously
Online Etymology Dictionary, © 2010 Douglas Harper