2476100 jmdict A [id=1987067]
荒ぶ；進ぶ；遊ぶ
すさぶ
[1][v5b,vi]
  to grow wild; to run to waste; to become degenerate
  [see=1984310・荒む[1]]
[2][v5b,vi]
  to become rough (of art, craft, etc.); to lose refinement; to deteriorate (of skill)
[3][v5b,aux-v,vi]
  [note="usu. after -masu stem"]
  to intensify (of wind, rain, etc.); to become more severe
[4][v5b,vi][arch]
  [restr=遊ぶ]
  to do as one pleases; to amuse oneself; to play around