dementalizing
/diːˈmɛnt(ə)lʌɪzɪŋ/ /diːˈmɛntəlʌɪzɪŋ/(also dementalising) Now rare
adjective
That deprives a person of the capacity for thought; that disturbs mental equilibrium or has a detrimental effect on the mind.
Origin
Mid 19th century; earliest use found in Robert Charles Sands (1799–1832). From de- + mental + -izing.