Brown Driver Briggs

 1. to withdraw, hide
  1) (Niphal) to hide oneself
  2) (Pual) to be forced into hiding
  3) (Hiphil) to hide
  4) (Hophal) to be hidden
  5) (Hithpael)
1e1. to hide oneself, draw back
1e2. to draw together, thicken, harden