Retainer
01
使用人, 従者
a person working in the service of another (especially in the household)
02
リテーナー, 歯列保持装置
a device used to maintain the position of teeth after braces are removed
例
After braces, Jenny wore a retainer to keep her teeth straight.
矯正後、ジェニーは歯をまっすぐに保つためにリテーナーを着用しました。
03
報酬, 前払い
a fee charged in advance to retain the services of someone
