The Vietnamese word "ngói" is a noun that means "tile" in English. It specifically refers to the flat pieces of material, usually made from clay or concrete, that are used to cover roofs, floors, or walls in buildings.
In some contexts, "ngói" can also refer to the action of tiling or the state of being tiled, but this is less common.
"Ngói" is an important term in Vietnamese construction and architecture, primarily used to denote tiles for roofing and flooring.