south-west
AdverbWordNet 3.0
Webster's Dictionary (GCIDE)
Southwest \South`west\ (?; colloq. sou"-.), n. The point of the compass equally from the south and the west; the southwest part or region. [1913 Webster]
Southwest \South`west"\, a. Pertaining to, or in the direction of, the southwest; proceeding toward the southwest; coming from the southwest; as, a southwest wind. [1913 Webster]