境界

boundary, border

kʲ o̞ː k a̠ i
noun Rare #27,915
boundary, border Can refer to a physical dividing line or to the limit between areas, groups, or states.
JA: この川が二つの町の境界です。
EN: This river is the boundary between the two towns.

結果ってのは境界にすぎないんだろ

The result is just a boundary, right?

— The Garden of Sinners: Paradox Spiral (2008)

彼らは境界を越えてスペインに入った。

They crossed the border into Spain.

そこが境界だ永遠の命を保つ境界だ

That is the boundary—the boundary that preserves eternal life.

— インディ・ジョーンズ/最後の聖戦 (1989)

彼らは石を並べて家の敷地の境界にした。

They lined up stones to mark the boundary of the house lot.

Sounds similar to