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Definition of pertinacious - 2 dictionary results

per⋅ti⋅na⋅cious

[pur-tn-ey-shuhs]
–adjective
1. holding tenaciously to a purpose, course of action, or opinion; resolute.
2. stubborn or obstinate.
3. extremely or objectionably persistent: a pertinacious salesman from whom I could not escape.

Origin:
1620–30; pertinaci(ty) + -ous


per⋅ti⋅na⋅cious⋅ly, adverb
per⋅ti⋅na⋅cious⋅ness, noun


1. persevering. 2. dogged.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To pertinacious
per·ti·na·cious   (pûr'tn-ā'shəs)   
adj.  
  1. Holding tenaciously to a purpose, belief, opinion, or course of action.

  2. Stubbornly or perversely persistent. See Synonyms at obstinate.


[From Latin pertināx, pertināc- : per-, per- + tenāx, tenacious (from tenēre, to hold; see ten- in Indo-European roots).]
per'ti·na'cious·ly adv., per'ti·na'cious·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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