noun
brain power; mental capacity
Refers to intellectual ability or mental capacity, often in contexts of learning, problem-solving, or cognitive performance.
彼は脳力が高く、難しい問題もすぐ解ける。
He has high brain power and can solve difficult problems quickly.
年をとっても脳力を維持するには、読書が効果的だ。
Reading is effective for maintaining brain power even as you age.