also: にしみなみ
noun
southwest
Refers to the direction or region of southwest. Used in geographic, navigational, and general contexts.
風は西南から吹いている。
The wind is blowing from the southwest.
その町は市の西南部に位置している。
The town is located in the southwestern part of the city.
Standard kanji spelling; the most common reading is せいなん.
Rare alternate reading; せいなん is overwhelmingly more common.
南西 also means southwest and is more common in modern Japanese for compass directions. 西南 is often used in proper nouns, regional names, or literary contexts.
Compound of 西 (west) and 南 (south). The reading せいなん is the Sino-Japanese on'yomi, while にしみなみ is a rare native kun'yomi reading.