Informal Crazy or foolish. de·ment′ed·ly adv. de·ment′ed·ness n.

What does Daminted mean?

: not able to think clearly or to understand what is real and what is not real : crazy or insane. See the full definition for demented in the English Language Learners Dictionary.

What does De mean in demented?

Demented is an adjective describing behavior that is crazy, unhinged, or insane. Someone is demented when they have gone off the deep end.