Definition
To behave in a way that demonstrates a severe lapse in good judgment or common sense.
失去理智
You must have taken leave of your senses to think of opening a new restaurant during such an economic downturn.
你一定失去了理智，才會想在經濟如此低迷的時候開一家新餐廳。
When she decided to quit her job to travel the world, everyone thought she had taken leave of her senses.
當她決定辭職去環遊世界時，大家都認為她失去了理智。
He must have taken leave of his senses to invest all his savings in that unstable company.
他一定是失去了理智，才會把所有的積蓄投資在那家不穩定的公司。