They are suffering from a mental disease of discouragement and loss of hope.
Hyperboreans have a mental disease which renders them liable to suggestion.
In no branch of medicine or sociology is this fallacy more fruitful of error than in the domain of mental disease.
What applies to physical disease is just as applicable to mental disease.
At the present moment a most grotesque and painful form of mental disease has come under my notice.
Grard died a violent death, but he was afflicted with mental disease.
The sexual passion has often been compared to drunkenness or to mental disease.
Sadness and pessimism are the worst forms of mental disease I know.
More akin to the tics is stereotypy of written language, so common an appanage of mental disease.
He has signs of mental disease which cannot now be confused with drink.
mental disease n.
See mental illness.
mental illness n.
Any of various disorders characterized chiefly by abnormal behavior or an inability to function socially, including diseases of the mind and personality and certain diseases of the brain. Also called mental disease, mental disorder.