This is the 10294th most frequent Japanese word.
頭脳
"頭脳" means "brain" or "intellect."
In this sentence, '頭脳' is used to describe intellectual sharpness or clarity, complemented by '明晰' (brilliance). It emphasizes his mental skill in the context of being a scientist.
彼は頭脳明晰な科学者です。
He is a brilliant scientist.
Here, '頭脳' refers to one's mental capacity or brainpower, indicating the necessity to apply thinking skills to resolve an issue.
頭脳を使ってこの問題を解決しなければなりません。
We have to use our brains to solve this problem.
In this example, '頭脳' signifies the mind or cognitive faculties that can be trained or sharpened by engaging in games.