IPA: //trɛf//
KK: /trɛf/
Not clean or suitable to eat according to Jewish dietary laws; considered unkosher.
The meat was deemed tref and could not be served at the dinner.
The word 'tref' originates from Old French 'trèfle', meaning clover. It refers specifically to the plant known for its three leaves, often associated with luck.
Think of the Old French word for clover, 'trèfle', which helps you remember that 'tref' refers to this lucky plant.