expression, godan verb (-su)
surmount a difficulty; cross a mountain
Idiomatic phrase meaning to overcome a difficult situation or literally cross a mountain. Often used metaphorically for getting past a peak or crisis.
See also: 峠を越す
このプロジェクトの山を越すまで、気が抜けない。
I can't relax until we get over the hump of this project.
峠
Just like crossing a mountain pass, there are times when you have to overcome life's difficulties.