hebetativeadj.

/ˈhɛbɪteɪtɪv/Etymology: < Latin hebetāt-, past participial stem of hebetāre : see -ive suffix.
the mind > emotion > absence of emotion > [adjective] > rendered emotionless > deadening or dulling
1834 New Ser. 1 586 Hebetative and instupifying qualities.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2018).