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noun
The quality possessed by something that you cannot possibly do without.
synonyms: indispensability, vitalness.
is a specific kind of: essentiality, essentialness.
is the opposite of: dispensability, dispensableness.
derivation: life-sustaining, vital | indispensable | essential, indispensable.
Find more on indispensableness elsewhere: etymology - rhymes - Wikipedia.
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