This is the 6464th most frequent Japanese word.
スリーブ
"スリーブ" (suriibu) means "sleeve" and can refer to a garment sleeve, a protective cover (e.g., for cards), or a sleeve-like part in machinery.
In this context, スリーブ (sleeve) is used to refer to card sleeves commonly used to protect collectible cards.
カードを保存するためにスリーブを買いました。
I bought sleeves to store cards.
Here, スリーブ (sleeve) refers to the sleeves of clothing, specifically those incorporated into a dress's design.
彼女のドレスはスリーブが美しくデザインされていました。
Her dress had beautifully designed sleeves.
In this example, スリーブ (sleeve) describes the protective covering material used for cables or wires to organize and shield them.