dement


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de·ment

 (dĭ-mĕnt′)
tr.v. de·ment·ed, de·ment·ing, de·ments
1. To cause (a person) to become mentally deranged.
2. To cause (a person) to lose intellectual capacity.

[Late Latin dēmentāre, from Latin dēmēns, dēment-, senseless : dē-, de- + mēns, mind; see men- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

dement

(dɪˈmɛnt)
vb
1. (Pathology) (intr) to deteriorate mentally, esp because of old age
2. (Psychiatry) (tr) rare to drive mad; make insane
[C16: from Late Latin dēmentāre to drive mad, from Latin de- + mēns mind]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

dement


Past participle: demented
Gerund: dementing

Imperative
dement
dement
Present
I dement
you dement
he/she/it dements
we dement
you dement
they dement
Preterite
I demented
you demented
he/she/it demented
we demented
you demented
they demented
Present Continuous
I am dementing
you are dementing
he/she/it is dementing
we are dementing
you are dementing
they are dementing
Present Perfect
I have demented
you have demented
he/she/it has demented
we have demented
you have demented
they have demented
Past Continuous
I was dementing
you were dementing
he/she/it was dementing
we were dementing
you were dementing
they were dementing
Past Perfect
I had demented
you had demented
he/she/it had demented
we had demented
you had demented
they had demented
Future
I will dement
you will dement
he/she/it will dement
we will dement
you will dement
they will dement
Future Perfect
I will have demented
you will have demented
he/she/it will have demented
we will have demented
you will have demented
they will have demented
Future Continuous
I will be dementing
you will be dementing
he/she/it will be dementing
we will be dementing
you will be dementing
they will be dementing
Present Perfect Continuous
I have been dementing
you have been dementing
he/she/it has been dementing
we have been dementing
you have been dementing
they have been dementing
Future Perfect Continuous
I will have been dementing
you will have been dementing
he/she/it will have been dementing
we will have been dementing
you will have been dementing
they will have been dementing
Past Perfect Continuous
I had been dementing
you had been dementing
he/she/it had been dementing
we had been dementing
you had been dementing
they had been dementing
Conditional
I would dement
you would dement
he/she/it would dement
we would dement
you would dement
they would dement
Past Conditional
I would have demented
you would have demented
he/she/it would have demented
we would have demented
you would have demented
they would have demented
Collins English Verb Tables © HarperCollins Publishers 2011
References in classic literature ?
The only fear they entertain of attack is from the green Martians or some demented red man, as all Barsoomians realize that the very existence of every form of life of Mars is dependent upon the uninterrupted working of this plant.
Scarcely were we clear when the foremast dropped down on the fastenings, dashing the jib-boom into the water with its load of demented human beings.
The meagre but sufficient identification of the deceased; the impudent candor of confession; the brutal anathema; the ludicrous change of sex and sentiment--all marked this record as the work of one who must have been at least as much demented as bereaved.
He rose and, putting his hand on my shoulder, laughed like one demented as he said:
Then the great bulls in the center of the arena felt the mighty fangs of their demented fellow, and with one accord they melted into the black shadows of the overhanging forest.
"He acts as if he were demented with delight at being rescued," Mrs.
But the whole effect is spoiled when I look at them - at Tetralani, five feet ten in her stocking feet and weighing a hundred and ninety pounds, and at Barillo, a scant five feet four, greasy-featured, with the chest of a squat, undersized blacksmith, and at the pair of them, attitudinizing, clasping their breasts, flinging their arms in the air like demented creatures in an asylum; and when I am expected to accept all this as the faithful illusion of a love-scene between a slender and beautiful princess and a handsome, romantic, young prince - why, I can't accept it, that's all.
Every living creature there held life as of no account, and was demented with a passionate readiness to sacrifice it.
At this, Mrs Boffin fairly screamed with rapture, and sat beating her feet upon the floor, clapping her hands, and bobbing herself backwards and forwards, like a demented member of some Mandarin's family.
His eyes staring at nothing, his mouth open and frothing, and breathing as one in a cold bath, he went forward demented, while Dan toiled after him.
The lake there is eight feet deep, and you can imagine our feelings when we saw that the trail of the poor demented girl came to an end at the edge of it.
George, who has been looking first at one of them and then at the other, as if he were demented, takes his venerable acquaintance by the throat on receiving this request, and dragging him upright in his chalr as easily as if he were a doll, appears in two minds whether or no to shake all future power of cushioning out of him and shake him into his grave.