adverb · to be stuck in one's ways; to refuse to change or improve despite criticism or changing circumstances

大家都劝他改掉坏毛病，但他依然故我，完全听不进去。

idiom · to remain one's old self; to be unchanged after a long period of time or major events

尽管环境发生了巨大变化，他却依然故我，保持着那份淡定。