境さかいする

suru verb (irregular), transitive verb

to set a boundary; to bound

Rare literary transitive suru verb meaning to establish or mark a boundary between areas. In modern Japanese, 境を接する or 境界を定める are far more common.

• その川かわが二ふたつの国くにを境さかいしている。

  The river forms the boundary between the two countries.