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a. Extremely persistent in adhering to or doing something; stubborn or relentless: "tenacious defenders of their harsh and pitiless land" (Dee Brown).
b. Characterized by extreme persistence; relentless or enduring: tenacious detective work; tenacious superstitions.
2. Holding together firmly; cohesive: a tenacious material.
3. Clinging to another object or surface; adhesive: tenacious lint.
4. Tending to retain; retentive: a tenacious memory.

[From Latin tenāx, tenāc-, holding fast, from tenēre, to hold; see ten- in Indo-European roots.]

te·na′cious·ly adv.
te·nac′i·ty (tə-năs′ĭ-tē), te·na′cious·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tenaciousness - persistent determinationtenaciousness - persistent determination    
determination, purpose - the quality of being determined to do or achieve something; firmness of purpose; "his determination showed in his every movement"; "he is a man of purpose"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Gimondi was known for his tenaciousness in the face of Merckx's dominance in the late 60s and early 70s but the two became friends, with Merckx in tears when he was told of Gimondi's death.
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Better known for his tenaciousness than his patience, Piazzolla's deference to his collaborator's silence finally broke.
When Banks finally gets Richards (Shaun Dooley) in for questioning, he brings out the big guns and satisfactorily slams him with all his macho Yorkshire angry tenaciousness.
WHIS dynamism in attack and his tenaciousness in defence.