This is the 3905th most frequent Japanese word.
クマ
"クマ" means "bear" in English.
クマ refers to 'dark circles' in this context.
彼は目の下にクマができました。
He developed dark circles under his eyes.
クマ indicates a toy representing a bear, typically a stuffed animal.
そのクマのぬいぐるみは可愛いですね。
That bear plush toy is cute.
クマ refers to the animal 'bear' here.