obdurate
adj
(fml 文) impossible to change; stubborn 固执的; 执拗的
an obdurate refusal 坚决的拒绝
He remained obdurate, refusing to alter his decision. 他依然固执己见, 拒不改变决定.
Parents would be greatly surprised and deeply touched if they realized how much belief their children usually have in their character and infallibility,