Dictionary.com
Thesaurus.com
Synonyms

pertinacious

American  
[pur-tn-ey-shuhs] / ˌpɜr tnˈeɪ ʃəs /

adjective

  1. holding tenaciously to a purpose, course of action, or opinion; resolute.

    Synonyms:
    persevering
  2. stubborn or obstinate.

    Synonyms:
    dogged
  3. extremely or objectionably persistent.

    a pertinacious salesman from whom I could not escape.


pertinacious British  
/ ˌpɜːtɪˈnæsɪtɪ, ˌpɜːtɪˈneɪʃəs /

adjective

  1. doggedly resolute in purpose or belief; unyielding

  2. stubbornly persistent

"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

Other Word Forms

Derived Forms

Etymology

Origin of pertinacious

First recorded in 1620–30; pertinaci(ty) + -ous

Explanation

If you won’t take no for an answer, you’re pertinacious. The same holds true if you stubbornly push on a door despite a sign that says “pull.” Pertinacious means unyielding or perversely persistent. We get pertinacious from the Latin pertinax, which combines per-, "thoroughly," with tenax, "tenacious." You can impress your friends by dropping pertinacious into conversation when referring to anyone who is bullheaded and obstinately stuck in their ways and opinions. If a Girl Scout is a pertinacious salesperson you might buy fifty boxes of Thin Mints when you only wanted one.

Keep Reading on Vocabulary.com

Vocabulary lists containing pertinacious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Pertinacious, he tried other methods, and four years later perfected.

From Time Magazine Archive

House of Commons, Monday, January 10th.—In spite of sharp rebuke administered by Speaker last week the Pertinacious Pringle to the fore again—to be precise, to the Forward.

From Punch, or the London Charivari, Vol. 150, January 19, 1916 by Seaman, Owen, Sir

Pertinacious, pėr-ti-nā′shus, adj. thoroughly tenacious: holding obstinately to an opinion or a purpose: obstinate: unyielding.—adv.

From Chambers's Twentieth Century Dictionary (part 3 of 4: N-R) by Various

THRAINN, the Pertinacious; from the v. thra, to desire vehemently.

From The Elder Eddas of Saemund Sigfusson; and the Younger Eddas of Snorre Sturleson by Saemund Sigfusson

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "pertinacious" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com