Etymology
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necessitate (v.)

1620s, "force irresistably, compel, oblige," also "make necessary, render unavoidable," from Medieval Latin necessitatus, past participle of necessitare "to render necessary," from Latin necessitas "compulsion; destiny" (see necessity). Earlier verb in English was necessen (late 14c.). Related: Necessitated; necessitates; necessitating.

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Definitions of necessitate

necessitate (v.)
require as useful, just, or proper;
Synonyms: ask / postulate / need / require / take / involve / call for / demand
necessitate (v.)
cause to be a concomitant;
From wordnet.princeton.edu