Brown Driver Briggs

 1. to be empty, be clear, be pure, be free, be innocent, be desolate,
be cut off
  1) (Qal) to be empty, be clean, be pure
  2) (Niphal)
1b1. to be cleaned out, be purged out
1b2. to be clean, be free from guilt, be innocent
1b3. to be free, be exempt from punishment
1b4. to be free, be exempt from obligation
  3) (Piel)
1c1. to hold innocent, acquit
1c2. to leave unpunished