Jōyō kanji, Taught in junior high
JLPT level: N1
1247 of 2500 most used kanji in newspapers
Stroke count: 13
Meaning: stubborn, foolish, firmly
Kunyomi: かたく.な
Onyomi: ガン
Composition: 元 頁
Radical: 頁
Meaning: leaf
頑張って （ガンバッテ） do your best, go for it, hang in there, keep at it
頑固 （ガンコ） stubborn, obstinate, pigheaded
頑な （かたくな） obstinate, stubborn, mulish, die-hard, bigoted