border
UK: ˈbɔːdə(r) | US: ˈbɔːrdər
n. a line separating two countries, regions, or areas
n. the edge or boundary of something
vt. to form a border along; to adjoin
The word border traces back to the concept of the "edge" of a ship or a plank, reflecting its early association with physical boundaries. Over time, it generalized to denote any dividing line or margin, influenced by Old French and Germanic roots. The suffix -er solidifies its function as a noun describing a boundary or the act of bordering.
The river forms a natural border between the two countries.
She planted flowers along the border of her garden.
Canada borders the United States to the north.
The painting has a decorative gold border.
The agreement aims to secure the border against illegal crossings.