Synonyms and Antonyms of pertinacious
- a pertinacious little boy who was determined to catch and collect reptiles
assured, certain, dedicated, determined, firm, hell-bent, intent, positive, resolute, resolved, single-minded, sure
adamant, bullheaded, dogged, hardened, hardheaded, headstrong, implacable, indurate, mulish, obdurate, obstinate, opinionated, peevish, pertinacious, perverse, pigheaded, self-willed, stiff-necked, stubborn, unregenerate, unyielding, willful (or wilful)
unfaltering, unhesitating, unwavering
resistant, wayward, wrongheaded
constant, devoted, faithful, good, loyal, staunch (also stanch), steadfast, steady, true
hard, inflexible, relentless, stern, unbending, unflinching, unrelenting
- a pertinacious salesman who would simply not take "No!" for an answer
adamant, adamantine, bullheaded, dogged, hard, hard-nosed, hardened, hardheaded, headstrong, immovable, implacable, inconvincible, inflexible, intransigent, mulish, obdurate, obstinate, opinionated, ossified, pat, perverse, pigheaded, self-opinionated, self-willed, stiff-necked, stubborn, unbending, uncompromising, unrelenting, unyielding, willful (or wilful)
determined, hell-bent, inexorable, persistent, relentless, resolved, set, single-minded, steadfast, stouthearted, tenacious, unflinching
firm, hard-line, hard-shell (or hard-shelled), iron, severe, stern, strict
hidebound, narrow-minded, rigid
bloody-minded [chiefly British], cantankerous
contumacious, disobedient, froward, insubordinate, intractable, recalcitrant, refractory, uncooperative, ungovernable, unmanageable, unruly