頑がん固こ一いっ徹てつConjugationsMeaningsNa-adjectiveNoun1. stubborn; obstinate; adamant; immovable (Yojijukugo)Kanji used頑stubborn固solidify一one徹penetratePitch accentがんこいってつComposed of頑がん固こstubborn; obstinate; pigheadedNa-adjective一いっ徹てつobstinate; stubborn; inflexibleNa-adjective