Japanese
Etymology 1
Abbreviation of ウェイ川 (Weigawa, “the Wei River”).
Proper noun
ウェイ • (Wei)
- 渭: The Wei River in China.
Etymology 2
Borrowed from English way.
Noun
ウェイ • (wei)
- A way, a road or path.
- A way, a method.
Usage notes
This spelling appears to be the most common.