IPA: /ˈkæs.ək/
KK: /ˈkæsək/
A long robe worn by priests and other church officials during religious ceremonies.
The priest wore a black cassock during the Sunday service.
Cassock originates from the Old French word *casque*, meaning a long coat or garment. It refers specifically to a type of long robe worn by clergy.
Think of the Old French word for a long coat, which helps you remember that a cassock is a long garment worn by clergy.