noun
random masonry; uneven stonework; disordered piling
Refers to a style of stone wall construction where stones of irregular shapes and sizes are piled without a regular pattern, often seen in traditional Japanese castle walls and retaining walls.
この城壁は乱積みで造られている。
This castle wall is built in the random masonry style.
乱積みの石垣は見た目に美しい。
A stone wall of uneven stonework is visually beautiful.