Necessitate v. t. : To make necessary or indispensable; to render unaviolable.

Necessitate v. t. : To reduce to the necessity of; to force; to compel.

Example:
What might Necessitate a redesign of the network?

Taxonomy
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Defination from the web:
necessitate from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "necessitate" and related topics at Britannica.com. See a map of "necessitate" in the Visual Thesaurus. Pronunciation ...