adjacent
UK: əˈdʒeɪs(ə)nt | US: əˈdʒeɪsənt
adj. next to or adjoining something else
adj. (mathematics) sharing a common vertex or side
Derived from Latin adiacēns (lying near), combining ad- (toward) and iacēre (to lie). The root jac- (from iacēre) appears in related words like "recline" (lie back) and "jacent" (lying flat). Over time, adiacēns evolved into Old French ajacent, then Middle English adjacent, retaining its core meaning of proximity. The mathematical sense emerged from geometric contexts where objects "lie next to" each other.
Our office is adjacent to the train station.
The two adjacent buildings share a courtyard.
In the diagram, angle A is adjacent to angle B.
She booked a hotel room adjacent to the conference center.
The adjacent farmland was sold for development.