unexpendable

unexpendable

[uhn-ik-spen-duh-buhl]
adjective
1.
essential; absolutely required: unexpendable resources vital to our security.
2.
not capable of being expended; inexhaustible: an unexpendable source of energy.
3.
not available for expenditure: The principal of the trust fund is unexpendable.

Origin:
un-1 + expendable

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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