necessitate UK /nɪˈsɛsɪteɪt/US /nəˈsɛsəˌteɪt/ verb2 •To make necessary; to behove; to require (something) to be brought about.The early departure of her plane necessitated her waking up at 4 a.m. •To force (a person) into a certain course of action; compel.The 26th of August was still colder than the day previous. Ice formed in all our water-vessels, and one was necessitated to the brisker kind of exercise in order to keep warm. — 1861 formsnecessitated · necessitating · necessitates · necessitateth