頑

ガン

かたく

頑, 元, 二, 儿, 丿, 頁, 貝, 目, 八

頁

stubborn, foolish, firmly

頑固(がんこ): stubbornness; obstinacy
頑張る(がんばる): (1) to persevere; to persist; to keep at it; to hang on; to hold out; to do one's best (2) to insist that; to stick to (one's opinion) (3) to remain in a place; to stick to one's post; to refuse to budge
頑丈(がんじょう): solid; firm; stout; burly; strong; sturdy