To Spend
To Expend, To Waste, To Consume
transitive verb, godan verb
Turn expense into a verb and you get to spend or to expend. Or, in some cases, to waste.
In addition to spending money, 費やす can be used to refer to spending other resources like time, effort, energy, and emotions.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with the kanji, so here's a mnemonic to help you:
Just as you're about to spend some money, a familiar sound comes from inside your wallet: "TWEET (つい)!" It's the little bird that lives inside your wallet and angrily tweets at you whenever you're about to waste money on something you don't need. Maybe you should listen to the bird tweeting from inside your wallet a little more.
時間を費やす
to spend time
お金を費やす
to spend money
労力を費やす
to expend effort
エネルギーを費やす
to expend energy
そのために費やす
to spend for that, to expend for the sake of that
ムダなことに費やす
to waste on unnecessary things
勉強に費やす
to dedicate to studying
ほとんど費やす
to spend almost all
かなり費やす
to spend considerably
勉強に時間を費やすのはとても良いことです。
Dedicating time to studying is a very good thing.
ムダな時間と労力を費やさないよう、気をつけています。
I'm trying to be careful not to waste time and effort.
男は、生活費のほとんどをパチンコに費やしてしまった。
The man spent most of his living expenses on pachinko.