dairy; milk shop; milkman
Refers to a shop that sells milk and dairy products, or the person who delivers milk. The context determines whether it means the shop or the person.
I bought fresh milk at the neighborhood dairy.
Every morning, the milkman delivers milk to our doorstep.
Compound of 牛乳 (gyūnyū, 'milk') and 屋 (ya, 'shop' or 'person who does something').