Definition of dementalized in English:
dementalized
(also dementalised)
adjective ˌdiːˈmɛnt(ə)lʌɪzdˌdiːˈmɛntəlʌɪzd
Deprived of the capacity for thought; brutalized or dehumanized; having lost mental capacity or a mental quality.
Origin
Mid 19th century; earliest use found in Pennsylvania School Journal. From de- + mental + -ized.