Englishfor English speakers
assistant
Noun
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An assistant is a person who helps (or assists) another person.
The doctor's assistant held his tools.
assistant
Adjective
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If you are assistant, you have a position under someone.
The assistant guard was in training to become a full guard.
mistress
Noun
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A mistress is a woman that a married man is having an affair with. She is not the man's wife, but the other woman that he is having a romantic or sexual relationship with. Usually, a mistress is kept secret.