PERTINACIOUS Synonyms: 153 Similar and Opposite Words

Q: How is the word 'pertinacious' distinct from other similar adjectives?

Some common synonyms of pertinacious are dogged , mulish , obstinate , and stubborn . While all these words mean "fixed and unyielding in course or purpose," pertinacious suggests an annoying or irksome persistence. // a pertinacious salesclerk refusing to take no for an answer

Q: When can 'dogged' be used instead of 'pertinacious'?

The synonyms dogged and pertinacious are sometimes interchangeable, but dogged suggests an admirable often tenacious and unwavering persistence. // pursued the story with dogged perseverance

Q: In what contexts can 'mulish' take the place of 'pertinacious'?

In some situations, the words mulish and pertinacious are roughly equivalent. However, mulish implies a thoroughly unreasonable obstinacy. // a mulish determination to have his own way

Q: When is it sensible to use 'obstinate' instead of 'pertinacious'?

While the synonyms obstinate and pertinacious are close in meaning, obstinate implies usually an unreasonable persistence. // an obstinate proponent of conspiracy theories

Q: When would 'stubborn' be a good substitute for 'pertinacious'?

Although the words stubborn and pertinacious have much in common, stubborn implies sturdiness in resisting change which may or may not be admirable. // a person too stubborn to admit error

pertinacious

adjective

ˌpər-tə-ˈnā-shəs

Definition of pertinacious

as in persistent

continuing despite difficulties, opposition, or discouragement a pertinacious little boy who was determined to catch and collect reptiles

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Antonyms & Near Antonyms

as in stubborn

sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion a pertinacious salesman who would simply not take "No!" for an answer

Synonyms & Similar Words

Antonyms & Near Antonyms

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How is the word pertinacious distinct from other similar adjectives?

Some common synonyms of pertinacious are dogged, mulish, obstinate, and stubborn. While all these words mean "fixed and unyielding in course or purpose," pertinacious suggests an annoying or irksome persistence.

a pertinacious salesclerk refusing to take no for an answer

When can dogged be used instead of pertinacious?

The synonyms dogged and pertinacious are sometimes interchangeable, but dogged suggests an admirable often tenacious and unwavering persistence.

pursued the story with dogged perseverance

In what contexts can mulish take the place of pertinacious?

In some situations, the words mulish and pertinacious are roughly equivalent. However, mulish implies a thoroughly unreasonable obstinacy.

a mulish determination to have his own way

When is it sensible to use obstinate instead of pertinacious?

While the synonyms obstinate and pertinacious are close in meaning, obstinate implies usually an unreasonable persistence.

an obstinate proponent of conspiracy theories

When would stubborn be a good substitute for pertinacious?

Although the words stubborn and pertinacious have much in common, stubborn implies sturdiness in resisting change which may or may not be admirable.

a person too stubborn to admit error

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of pertinacious But Kerry, the pertinacious diplomat and former Massachusetts senator, sees too much to do — and insisted in an interview with The Boston Globe there is too much to possibly achieve — to quit just yet. — Jess Bidgood, BostonGlobe.com, 26 Feb. 2023

Recent Examples of Synonyms for pertinacious

Adjective

Why recruiting became political The Pentagon is emerging from the yearslong recruiting slump that followed the COVID-19 pandemic, easing one of the military's most persistent political headaches that drew bipartisan anxiety on Capitol Hill.

— Steven Beynon, ABC News, 17 Aug. 2026
There is also persistent friction between Arab and Kurdish communities in the northeast of the country, and the government has had to respond to pockets of violence against the religious Alawite minority along Syria’s coast.

— Paula Hancocks, CNN Money, 16 Aug. 2026

Definition of persistent

Adjective

Volatile job numbers, stubborn inflation and changes to the Fed’s communications style are all stirring up uncertainty in markets and raising the stakes for upcoming economic data releases — including this week’s inflation report.

— John Towfighi, CNN Money, 11 Aug. 2026
The softening job market may complicate the calculation for the Federal Reserve, which is also battling stubborn inflation.

— Scott Horsley, NPR, 7 Aug. 2026

Definition of stubborn

Adjective

So why were the Board of Peace and mediators insistent on moving forward with the plan now?

— Mkhaimar Abusada, The Conversation, 6 Aug. 2026
James Madison was insistent that Congress was the most important and powerful branch, especially the House, which was closest to the people and, being elected every two years, would infuse new blood and new ideas into Congress in perpetuity.

— Sun Sentinel Editorial Board, Sun Sentinel, 11 July 2026

Definition of insistent

Adjective

Still, co-founder and CEO Adam Taubenfligel remains resolute.

— Angela Velasquez, Footwear News, 7 Aug. 2026
That approach has totted up 38 unbeaten matches and created a resolute backline – another key trait of almost all World Cup winners – through pragmatism-by-possession.

— Chris Evans, Forbes.com, 20 July 2026

Definition of resolute

Adjective

Miller has remained steadfast in his commitment to stay in the race despite GOP calls for the second-term congressman to step down, as well as a House Ethics Committee investigation.

— Claire Carter, The Washington Examiner, 14 Aug. 2026
That interloper was Shadow, who became Jackie's steadfast mate right up until her hospitalization last month.

— Amanda Lee Myers, USA Today, 11 Aug. 2026

Definition of steadfast

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“Pertinacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/pertinacious. Accessed 18 Aug. 2026.

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