early 14c., "female teacher, governess," from Old French maistresse "mistress (lover); housekeeper; governess, female teacher" (Modern French ma?tresse), fem. of maistre "master" (see master (n.)). Sense of "a woman who employs others or has authority over servants" is from early 15c. Sense of "kept woman of a married man" is from early 15c.
例文
1. Anthony sometimes felt that his mistress was his superior in will-power.
時にはアンソニーは彼よりも愛人の方が意志力があると感じている。
2.She had always been mistress of her own destiny.
彼女はいつも自分の運命を把握することができる。
3.We had a very good mathematics mistress who pulled me up.
私たちには素晴らしい女性数学の先生がいて、彼女は私をレベルアップさせてくれました。/
4.Barking deliously,the dog bounded towards his mistress .