demented
adjective /dɪˈmentɪd/
/dɪˈmentɪd/
- (especially British English) behaving in a crazy way because you are extremely upset or worried
- I've been nearly demented with worry about you.
- The children have driven me demented today.
- He was crashing about the house like a demented animal.
- (old-fashioned or medical) suffering from dementiaTopics Illnessc2
Word Originmid 17th cent.: past participle of earlier dement ‘drive mad’, from Old French dementer or late Latin dementare, from demens ‘out of one's mind’.