Brown Driver Briggs

 1. to tremble, quake, move about, be afraid, be startled, be terrified
  1) (Qal)
1a1. to tremble, quake (of a mountain)
1a2. to tremble (of people)
1a3. to be anxiously careful
1a4. to go or come trembling (with prep)
  2) (Hiphil)
1b1. to cause to tremble
1b2. to drive in terror, rout (an army)