necessitate
Necessitate (verb) means to make something needed, so that it has to happen.
Etymology
From earlier necessitat, from Medieval Latin necessitātus, perfect past participle of necessitō (“to make necessary”) (see -ate (verb-forming suffix, of participial origin)), from Classical Latin necessitās (“necessity, need”) + -ō. Necessitās is derived from necesse (“unavoidable”) (from ne- (“not”) + cessus (“conceded, given up, yielded”). By surface analysis, necessitō + -ate.