uán-kòo頑固

stubborn

stubborn; obstinate; conservative; traditionalist; diehard; persistent; chronic; hard to treat

medicine

English Wiktionary, “頑固” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E9%A0%91%E5%9B%BA · confidence: Medium (Wiktionary, Hokkien)