Be Completely At A Loss
... Be Completely At A Loss 丈二和尚摸不着头脑 ; 堕入五里雾中 Be Quite At A Loss 茫然不解 To be at a loss 手足无措 ...
丈二和尚摸不着头脑,意思是比喻弄不明情况,搞不清底细,原义一丈二尺高的金刚摸不着脑袋。出自明·周楫《西湖二集》卷二八:“丈二长的和尚,摸不着头脑。”