verb (used with object), ne·ces·si·tat·ed, ne·ces·si·tat·ing.
to make necessary or unavoidable: The breakdown of the car necessitated a change in our plans.
to compel, oblige, or force: The new wage demand will necessitate a price increase.
Origin of necessitate
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
to cause as an unavoidable and necessary result
(usually passive) to compel or require (someone to do something)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1620s, from Medieval Latin necessitatus, past participle of necessitare "to render necessary," from Latin necessitas (see necessity). Earlier verb in English was necessen (late 14c.). Related: Necessitated; necessitates; necessitating.
Online Etymology Dictionary, © 2010 Douglas Harper