This is the 4533rd most frequent Japanese word.
峠
Mountain pass.
峠 refers to a physical mountain pass that is crossed.
彼は峠を超えて反対側の村へ向かった。
He crossed the mountain pass to reach the village on the other side.
峠 metaphorically indicates the critical stage or turning point.
現在、彼の病気は峠を越えたようだ。
Currently, it seems his illness has passed its critical stage.
峠道 combines 峠 with 道 and refers to roads in a mountain pass area.