noun / verb
border
BOR-der/ˈbɔːrdər/
The boundary at the edge of something.
A dark line marks the border between the two regions.

Etymology
Old French bordeure named a seam or edge, including the edge of a shield. That concrete outer margin became a geographical boundary: the edge of a city’s or country’s territory.
In context
it is extremely important that we have a managed border uh between the two countries
More examples
- A floral border runs around the scarf.
- Mexico borders the United States.
- His confidence borders on arrogance.
Forms
border · borders · bordered · bordering
borderland noun — An area near a territorial border.
Similar words
- boundary
- Boundary applies to any limit, including property and administrative divisions.
- frontier
- Frontier can mean the region along a border, not just its line.