illegalizev.

/ɪˈliːɡəlʌɪz/Etymology: < illegal adj. + -ize suffix.
society > law > rule of law > illegality > render illegal [verb (transitive)]
1818 in H. J. Todd
1866 28 Apr. 472/2 The official presence of representatives from the bogus State of Western Virginia illegalises its functions.
This entry has not yet been fully updated (first published 1899; most recently modified version published online September 2018).