xī
west
西 was written two different ways in ancient scripts: (1) a pictograph of a bird's nest, and (2) a variant of the phonetically similar 囟.
Oracle script
Bronze script
Seal script
Clerical script
Regular script
Simplified component in 1 character (1 verified)
Unknown component in 1 character (1 verified)
季旭昇《說文新證》p.831-832