prey on
US /preɪ ɑn/
UK /preɪ ɑn/

1.
2.
食い物にする, 苦しめる
to exploit or harm someone who is weaker or more vulnerable
:
•
Scammers often prey on the elderly and lonely.
詐欺師はしばしば高齢者や孤独な人々を食い物にする。
•
His fears began to prey on his mind.
彼の恐怖が彼の心を蝕み始めた。