noun, noun or participle which takes 'suru'
going west; heading westward
Neutral term for traveling or moving in a western direction. Can be used as a noun or with する to mean 'to go west'.
台風は西行している。
The typhoon is heading westward.
彼は西行を決意した。
He decided to go west.
Compound of 西 (west) and 行 (going). The reading せいこう is the on'yomi of both characters.