downhill
adverb, adjective uk/ˌdaʊnˈhɪl/ us/ˌdaʊnˈhɪl/
C2 向山下，朝坡下；下山的，下坡的
(moving) towards the bottom of a hill
It's so much easier running downhill! 跑下山去容易多了！
The route is all downhill from here to the finishing line. 这条路线从这里到终点都是下坡。
Compare: uphill
Idioms
be (all) downhillidiom 容易多了，好办多了
to be much easier
Once we get the preparation done, it'll be downhill all the way. 一旦完成了准备工作，其余的事情就好办了。
If I can just get through the training period, it'll be all downhill from here. 如果我能熬过培训阶段，其余的日子就好过多了。
go downhillidiom C2 走下坡路，每况愈下
to gradually become worse
After his wife died, his health started to go downhill. 自从妻子去世后，他的健康状况开始每况愈下。