1. 阵痛：traumatize 损伤 | travail 阵痛 | travel agency 旅行社

2. 艰苦的努力：trauma 外伤 | travail 艰苦的努力 | travel document 旅行文件

3. 工作：aimer 喜爱,爱好 | travail 工作 | rentrer 进来

4. 艰苦劳动,痛苦：traumatic 造成精神创伤的,令人痛苦而难忘的 | travail 艰苦劳动,痛苦 | travelogue 旅行见闻,游记

1. 艰苦劳动;难题
You can refer to unpleasant hard work or difficult problems as travail .

e.g. He did whatever he could to ease their travail.
他为减轻他们的辛劳做了力所能及的一切。

noun

1. use of physical or mental energy
hard work

e.g. he got an A for effort
they managed only with great exertion

Synonym: effortelbow greaseexertionsweat

2. concluding state of pregnancy
from the onset of contractions to the birth of a child

e.g. she was in labor for six hours

Synonym: parturiencylaborlabourconfinementlying-inchildbed