What does 頑固 mean?
頑固 is a Japanese noun meaning “stubbornness, obstinacy” in English. It is written as 頑固 in kanji, がんこ in hiragana, and ganko in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
彼は性質が頑固だ。
He is obstinate in disposition.