west, Spain
西 centers on the direction west. The meaning 'Spain' is a modern abbreviation derived from the first character of 西班牙 (Spain), not a core conceptual extension.
西 is a pictograph of a bird settling into a nest, associated with sunset and the west. The modern form is stylized but retains the basic nest-like shape.
Picture a bird settling into its nest as the sun goes down in the west. The shape of 西 looks like a nest with a bird's head peeking out.
For セイ, imagine the sun setting in the west and a voice saying 'say' goodbye to the day: say -> セイ.
west
Kansai (region comprising Kyoto, Osaka, Kobe and surrounding prefectures)
the West; the Occident; Western countries
western Japan (usu. Chūbu region and westward)
east and west
western part; the west (of a region)
west side; west bank
northwest
west entrance; west exit
watermelon (Citrullus lanatus)
southwest
Common Era; CE; Christian Era; anno domini; AD
Western Europe
western direction
south-west
West Germany (1949-1990); Federal Republic of Germany
west wind
Atlantic Ocean
Western person; Westerner
West Germany (1949-1990)
person from the Kansai region; Kansai native
Kansai dialect