prey (i.e. of a predator); kill
victim (of a crime, a hoax, etc.)
弱い動物は肉食獣の餌食になりやすい。
Weak animals are easily preyed upon by carnivores.
詐欺師の甘い言葉に騙され餌食となった。
Deceived by the swindler's sweet words, they fell prey to him.
油断した兵士は敵の餌食にされた。
The careless soldiers were made prey by the enemy.