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ease of use; user-friendliness; usability; utility; convenience
この包丁は使い勝手がよくて人気だ。
This kitchen knife is popular because it is easy to use.
このアプリは使い勝手が悪くて操作に戸惑う。
This app is difficult to use and the controls are confusing.
改修後のキッチンは使い勝手が格段に向上したと好評だ。
The kitchen after renovation is well-regarded for its greatly improved usability.