[uhn-ik-spen-duh-buh
l] 
| 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. |
| unexpendable | |
adjective | |
| not suitable to be expended [ant: expendable] |