以西

以西 is a prepositional phrase meaning 'west of' or 'to the west of.' It is used to indicate a location relative to another point, typically in geographical or directional contexts.

The character 以 (yǐ) often functions as a preposition meaning 'with' or 'by,' while 西 (xī) means 'west.' Together, 以西 literally translates to 'by the west' or 'west of,' indicating a position or direction.

This term is commonly used in geography, maps, and daily conversation when describing locations. It is often paired with specific places or landmarks, such as cities or regions, to describe their relative position.