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.

Word History and Origins

Origin of unexpendable¹

un- ¹ + expendable

Example Sentences

But nature sustained by unexpendable forces must abide.

From Project Gutenberg

Nature filled with unexpendable forces continues in form.

From Project Gutenberg