/ ɪkˈspend; NAmE / verb
[ vn ] expend sth (in / on sb) | expend sth (in / on / doing sth) ( formal ) to use or spend a lot of time, money, energy, etc. :
She expended all her efforts on the care of home and children.
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WORD ORIGIN
late Middle English : from Latin expendere , from ex- out + pendere weigh, pay. Compare with spend .