ex·pend 
(
ĭk-sp
ĕnd
)
tr.v. ex·pend·ed,
ex·pend·ing,
ex·pends 1. To lay out; spend: expending tax revenues on education. See Synonyms at spend.
2. To use up; consume: "Every effort seemed to expend her spirit's force" (George Meredith).
[Middle English expenden, from Latin expendere, to pay out : ex-, ex- + pendere, to weigh; see (s)pen- in the Appendix of Indo-European roots.]