demented

[ dih-men-tid ]
/ dɪˈmɛn tɪd /

adjective

crazy; insane; mad.
affected with dementia.

Origin of demented

First recorded in 1635–45; dement + -ed2

OTHER WORDS FROM demented

de·ment·ed·ly, adverb de·ment·ed·ness, noun half-de·ment·ed, adjective sem·i·de·ment·ed, adjective

Definition for demented (2 of 2)

dement
[ dih-ment ]
/ dɪˈmɛnt /

verb (used with object) Obsolete.

to make mad or insane.

Origin of dement

1535–45; < Late Latin dēmentāre to deprive of mind, equivalent to Latin dēment- (stem of dēmēns) out of one's mind ( dē- de- + ment- (stem of mēns) mind) + -āre infinitive suffix

Example sentences from the Web for demented

British Dictionary definitions for demented (1 of 2)

demented
/ (dɪˈmɛntɪd) /

adjective

mad; insane

Derived forms of demented

dementedly, adverb dementedness, noun

British Dictionary definitions for demented (2 of 2)

dement
/ (dɪˈmɛnt) /

verb

(intr) to deteriorate mentally, esp because of old age
(tr) rare to drive mad; make insane

Word Origin for dement

C16: from Late Latin dēmentāre to drive mad, from Latin de- + mēns mind

Medical definitions for demented

demented
[ dĭ-mĕntĭd ]

adj.

Mentally ill; insane.
Suffering from dementia.