Definition
To be completely unable to understand something; to find something very confusing or nonsensical.
白話、看不懂
The contract is written so complexly that I can't make head nor tail of it.
合約寫得太複雜了，我完全搞不懂。
I tried to understand the report, but the data and charts in it made me unable to make head nor tail of it.
我試著理解這份報告，但裡面的數據和圖表讓我完全摸不著頭緒。
I can't make head nor tail of her joke; I don't understand what's funny.
我聽不懂她的笑話；我不知道哪裡好笑。