deranged
adjective /dɪˈreɪndʒd/
  /dɪˈreɪndʒd/
 - unable to behave and think normally, especially because of mental illness
- mentally deranged
 - a deranged attacker
 - At first I thought he was deranged.
 - The plan seemed to be the product of a deranged mind.
 
Oxford Collocations Dictionaryverbs- be
 - seem
 - become
 - …
 
- completely
 - slightly
 - mentally
 - …
 
Word Originlate 18th cent.: from French déranger, from Old French desrengier, literally ‘move from orderly rows’ + -ed.