so important that you must do it or have it : absolutely needed. : unable to be changed or avoided. Source: Merriam-Webster's Learner's Dictionary. Examples: ...
Although I wished to think that all was false, it was yet
1Needed to be done, achieved, or present; essential: they granted the
Considered under its metaphysical aspect, being in its relation to existence is
and directly from Latin necessarius "unavoidable, indispensable,