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Pronunciation:  `pur'tneyshus

WordNet Dictionary
[adj]  stubbornly unyielding; "dogged persistence"; "dour determination"; "the most vocal and pertinacious of all the critics"; "a mind not gifted to discover truth but tenacious to hold it"- T.S.Eliot; "men tenacious of opinion"

PERTINACIOUS is a 12 letter word that starts with P.


 Synonyms: bulldog, dogged, dour, stubborn, tenacious, unyielding



Webster's 1913 Dictionary
\Per`ti*na"cious\, a.[L. pertinax, -acis; per +
tenax tenacious. See {Per-}, and {Tenacious}.]
1. Holding or adhering to any opinion, purpose, or design,
   with obstinacy; perversely persistent; obstinate; as,
   pertinacious plotters; a pertinacious beggar.

2. Resolute; persevering; constant; steady.

         Diligence is a steady, constant, and pertinacious
         study.                                --South.

Syn: Obstinate; stubborn; inflexible; unyielding; resolute;
     determined; firm; constant; steady. --
     {Per`ti*na"cious*ly}, adv. -- {Per`ti*na"cious*ness}, n.

Thesaurus Terms
 Related Terms: assiduous, balking, balky, bigoted, bulldogged, bulldoggish, bulletheaded, bullheaded, case-hardened, clamant, clamorous, constant, continuing, crying, demanding, diligent, dogged, dogmatic, draining, enduring, exacting, exigent, exorbitant, extortionate, faithful, fanatic, fixed, game, gamy, grasping, gritty, gutsy, gutty, hardheaded, headstrong, immutable, importunate, inalterable, indefatigable, indomitable, industrious, insistent, instant, intolerant, invincible, lasting, loud, loyal, mettlesome, mulish, nervy, never-tiring, obstinate, opinionated, overzealous, patient, patient as Job, permanent, perseverant, persevering, persistent, persisting, perverse, pigheaded, plodding, plucky, plugging, preoccupied, pressing, rapt, red-blooded, refractory, relentless, resolute, restive, sedulous, self-willed, set, single-minded, sleepless, slogging, spirited, spiritful, spunky, stable, steadfast, steady, stiff-necked, strongheaded, strong-willed, stubborn, sulky, sullen, taxing, tenacious, tireless, tough, unabating, unconquerable, uncooperative, undaunted, undiscouraged, undrooping, unfailing, unfaltering, unflagging, unflinching, unintermitting, uninterrupted, unnodding, unregenerate, unrelaxing, unrelenting, unremitting, unshakable, unsleeping, unswerving, untiring, unwavering, unwearied, unwearying, unwinking, unyielding, urgent, utterly attentive, weariless, willful