dishumanizationn.
Etymology: < dishumanize v. + -ation suffix.Previous versions of the OED give the stress as: disˌhumaniˈzation.
1909 H. James XVII. Pref. London was a terrible place to die in; doubtless not so much..by conscious cruelty or perversity as under the awful doom of general dishumanisation.
This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2019).