noun
fruit knife; paring knife
A small knife used for peeling and cutting fruit.
果物ナイフでリンゴの皮をむく。
I peel the apple with a fruit knife.
ペティナイフ is a small utility knife used for various kitchen tasks, while 果物ナイフ is specifically for fruit.
Compound of 果物 (fruit) and ナイフ (knife), a straightforward modern loanword blend.