頑固一徹 がんこいってつ Meanings な-adjective, Noun stubborn; obstinate; adamant; immovable Kanji 頑 stubborn. Read as ガン. 固 solid 一 one. Read as イチ. 徹 thorough. Read as テツ. Example sentences 父ちゃんは仕事に頑固一徹な人間です。My dad is a stubborn man at his job. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists