unhinged
1. [ adjective ] affected with madness or insanity
Synonyms: crazy mad sick unbalanced disturbed distracted demented brainsick
Examples:

"a man who had gone mad"

Related terms: insane
Similar spelling:   unhinge
  unmingled
  unionized
  unionised
  unengaged
  unionize
  unionise
  unangry
  unionist
  unionism
  union_card
  uninsured
  uninjured
  unamusing