Synonyms for pertinacious
See pertinacious in Webster's New World Roget's A-Z Thesaurus II
adjective
Tenaciously unwilling to yield:
bullheaded, dogged, hardheaded, headstrong, mulish, obstinate, perverse, pigheaded, stiff-necked, tenacious, willful. See resistDifficult to alleviate or cure:
obstinate, persistent, stubborn. See continue
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