驛

Glyph origin
.

Etymology
Same word as. See there for more.

Alternatively, suggest that this is perhaps a loan from a hypothetical  compound, but this seems to be highly speculative.

The Taiwanese Hokkien sense is an.

Definitions

 * 1) posthorse
 * 2) relay station (for posting horses)
 * 3)  train station, bus stop, or similar

Noun

 * : station (train, underground/subway)