To spend, expend, or consume (time, money, effort); to allocate resources to something.
彼女は留学に多くの時間とお金を費やした。
She spent a lot of time and money on studying abroad.
新製品の開発に数年を費やしたプロジェクトだ。
It's a project that spent several years on new product development.
この仕事にはかなりの労力を費やす必要がある。
This job requires expending a considerable amount of effort.
To waste or squander (time, money, etc.); to throw away resources unnecessarily.
無駄な会議に時間を費やすのは避けたい。
I want to avoid spending time on pointless meetings.
彼はギャンブルで財産を費やしてしまった。
He squandered his fortune on gambling.
To devote (time, effort, thought) to something; to commit oneself to a purpose.
彼は研究に一生を費やす決意をした。
He decided to devote his life to research.
親は子どもの教育に多くの愛情と時間を費やす。
Parents devote a lot of love and time to their children's education.
プロジェクト成功のために全員が力を費やした。
Everyone expended effort for the success of the project.