southwestward

from WordNet (r) 3.0 (2006)

southwestward
    adv 1: in a southwestward direction [syn: {southwestward},
           {southwestwardly}]
    adj 1: toward the southwest
    n 1: the compass point midway between south and west; at 225
         degrees [syn: {southwest}, {sou'-west}, {southwestward},
         {SW}]

from The Collaborative International Dictionary of English v.0.48

Southwestward \South`west"ward\, Southwestwardly
\South`west"ward*ly\, adv.
   Toward the southwest.
   [1913 Webster] Souvenance