southwest

Concise Oxford English Dictionary © 2008 Oxford University Press:
south-west

▶noun

• 1 (usu. the south-west) the direction towards the point of the horizon midway between south and west.

• 2 the south-western part of a country, region, or town.

▶adjective

• 1 lying towards, near, or facing the south-west.

• 2 (of a wind) blowing from the south-west.

▶adverb to or towards the south-west.

– derivatives
south-western adjective.