Able to be spent or used up; capable of being sacrificed or discarded.
Variant spelling of 'expendable,' from Latin 'expendere' (to spend, weigh out) + '-ible' (variant of '-able'). Both '-ible' and '-able' mean 'capable of being.'
Expendible and expendable are synonyms, but expendable is far more common in modern English. The '-ible' ending (-ible vs -able) is mostly a historical accident—they mean the same thing!
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