Definition
Was unable to recall or formulate an idea; to not know what to do or think.
想不出
I was so exhausted last night that I couldn't think of anything.
昨晚我太累了，以至於我什麼都想不起來。
When asked the question, he couldn't think of an answer for a moment.
當被問到這個問題時，他一時想不出答案。
I tried to remember where I put my keys, but I just couldn't think.
我試著回想我把鑰匙放在哪裡，但我就是想不到。