neighbourhood; vicinity; surrounding area
Refers to the area around a particular place; often used in descriptions of a location's surroundings.
There are many convenience stores in this neighbourhood.
all sides; every direction; frontiers
Used for the four directions or all sides of a country or region; can imply borders or frontiers.
Specifically refers to the four edges of a square, rectangle, or similar shape.
The four sides of a square are equal in length.
The country is surrounded by sea on all sides.
quadrilateral; quadrangle; tetragon
Compound of 四 (four) and 辺 (side, vicinity). The reading しへん is the on'yomi for both characters.