gastar

to spend (money, time, resources); to wear, wear out (deteriorate by using); to use up, to expend, to consume (energy, water etc.); to play (jokes); to have or wear

Likely inherited from Latin vastāre, with the initial consonant influenced by Frankish *wōstijan and with the resulting /ɡw/ reducing to /g/ in unstressed initial position, as also in galardón.