Brown Driver Briggs

 1. to work, serve
  1) (Qal)
1a1. to labour, work, do work
1a2. to work for another, serve another by labour
1a3. to serve as subjects
1a4. to serve (God)
1a5. to serve (with Levitical service)
  2) (Niphal)
1b1. to be worked, be tilled (of land)
1b2. to make oneself a servant
  3) (Pual) to be worked
  4) (Hiphil)
1d1. to compel to labour or work, cause to labour, cause to serve
1d2. to cause to serve as subjects
  5) (Hophal) to be led or enticed to serve