xaksu -xak- gismu

x1 (event) uses up/depletes/consumes/[wastes] x2 [resource].

Waste (= fesxaksu, dusxaksu). See also citka, festi, daspo, livla, pinxe.

In notes:

citka
x1 eats/ingests/consumes (transitive verb) x2.
daspo
x1 (event) destroys/ruins/wrecks/despoils x2; x1 is destructive.
festi
x1(s) is/are waste product(s) [left to waste] by x2 (event/activity).
livla
x1 is a fuel/energy-source for powering x2.
pinxe
x1 (agent) drinks/imbibes beverage/drink/liquid refreshment x2 from/out-of container/source x3.