峠 (とうげ)(mountain) pass; highest point on a mountain road; ridge

(mountain) pass; highest point on a mountain road; ridgenoun (common) (futsuumeishi), noun, used as a suffix
peak (e.g. of summer); worst (e.g. of an illness); crisisnoun (common) (futsuumeishi)

峠, its kanji, and other words that share them.Open this graph

Kanji in 峠

峠を越えるとうげをこえるto pass the peak (of something); to get through the most difficult part
峠を越すとうげをこすto pass the peak (of something); to get through the most difficult part
峠越えとうげごえcrossing a mountain pass
峠道とうげみちroad over a mountain pass
洞が峠をきめこむほらがとうげをきめこむto wait for a good opportunity; to come down on the right side of the fence
洞が峠を決め込むほらがとうげをきめこむto wait for a good opportunity; to come down on the right side of the fence
洞ヶ峠をきめこむほらがとうげをきめこむto wait for a good opportunity; to come down on the right side of the fence
洞ヶ峠を決め込むほらがとうげをきめこむto wait for a good opportunity; to come down on the right side of the fence

See how 峠 connects to the rest of Japanese.