be of unsound mind

To have impaired or dysfunctional thought, memory, and/or cognitive understanding; unable to think and/or understand for oneself. My poor grandfather has been of unsound mind ever since he suffered that stroke last year.

Common Names:

Name	Pronounced	Usage
Anemone	ə-NEM-ə-nee	English (Rare)
Gray	[grei]
Etna	-	Irish
Stoyan	-	Bulgarian
Arthit	-	Thai
Inge	ING-e (Danish, Norwegian, Swedish), ING-gə (German), ING-ə (Dutch)	Danish, Norwegian, Swedish, German, Dutch