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pertinacious
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per·ti·na·cious

pertinacious

 
 
pronunciation:
puhr t neI shs
features:
Word Parts
part of speech: adjective
definition 1: tenacious in purpose, opinion, or the like; persevering.
If he'd been more pertinacious, I'm sure he would have won over the committee's support.
synonyms:
firm, persevering, persistent, tenacious
similar words:
assiduous, diligent, laborious, sedulous, tireless, unshakable
definition 2: stubbornly determined in action; persistent.
synonyms:
dogged, persistent
similar words:
adamant, firm, hardheaded, inflexible, insistent, mulish, resolute, stubborn, unbending, uncompromising
derivations: pertinaciously (adv.), pertinaciousness (n.)
Word Parts  About this feature
The word pertinacious contains the following parts:
-acious Latin adjective-forming suffix that means full of, characterized by
Show wordsHide wordsMore about this word part:
The suffix -acious forms adjectives from Latinate nouns ending in "-acity," "-acy," or "-ce." Most common adjectives ending in -acious have a corresponding noun form ending in "-acity."