become demented

Shad had no doubt Bob had become demented, but without question obeyed the command.

This led the old people to believe that for the loss of her son and husband she had become demented and had destroyed herself.

Old Crompton began to fear the glitter in the eyes of the gaunt young man who seemed suddenly to have become demented.

Domestic cattle and horses often eat this plant; where it is abundant, and become demented in consequence.

He supposed that Wiggins had become demented, and that he was in the presence of a maniac.