prey on

phrasal verb
1
to hunt and kill another animal for food
شکار کردن, صید کردن, کمین کردن برای شکار
homophones atpraise
2
to harm somebody who is weaker than you, or make use of them in a dishonest way to get what you want
طعمه قرار دادن, سوء استفاده کردن, استثمار کردن
Bogus social workers have been preying on old people living alone.