capable of being expended.

(of an item of equipment or supply) consumed in use or not reusable.

considered to be not worth keeping or maintaining.

Military . (of personnel, equipment, or supplies) capable of being sacrificed in order to accomplish a military objective.

Usually, expendables. an expendable person or thing.

adjective

important , indispensable , necessary , useful

adjective

dispensable , disposable , excess , inessential , nonessential , replaceable , superfluous , unimportant