mental
ˈmentl adj
1 relating to the health or state of someone’s mind 精神健康的; 精神状态的; only before noun 仅用于名词前
6 thinking or behaving in a way that seems crazy or strange [英,非正式] 〔思维或行为〕疯癫的,不正常的 not before noun 不用于名词前 | BrE informal
他一定是疯了!