yeoman's service

Noun

idiomatic of behavior by a person of an object or characteristic

Japanese Meaning

非常に熱心で力の入った奉仕、骨折り作業（人の行動としての意味） / 信頼性が高く、有用で、能力のあるサービス（物や特徴としての意味）

Her yeoman's service during the crisis kept the shelter running and saved countless lives.

彼女の献身的かつ骨の折れる働きによって、危機の間、避難所は運営され続け、多くの命が救われた。

Sense（1）

(idiomatic, of behavior by a person) Arduous work, performed in a vigorous, committed manner.

He hath done yeoman's service, and proved himself staunch and faithful.

Sense（2）

(idiomatic, of an object or characteristic) Reliable, useful, capable service.

I once did hold it, as our statists do,

A baseness to write fair and labour'd much

How to forget that learning, but, sir, now

It did me yeoman's service.