費やす
ついやす · tsuiyasu · JLPT N1 · verb-godan
to waste
💸 費 = expense or cost, so 費やす = let a cost run out: spend, devote, or waste
The kanji 費 means expense or cost, the core idea of spending. The verb covers spending money, time, or effort, whether generously (devoting) or carelessly (wasting).