Expendable

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wiktionary

ref 

expend +‎  -able


etymonline

ref

expendable (adj.)

1805, "that can be consumed by use," from expend + -able. By 1942 in the military sense, especially of men, "that may be sacrificed to attain an objective."

取自“https://www.bigphysics.org/index.php?title=Expendable&oldid=39494”