險(けわ)しい

steep; rugged; harsh

險悪(けんあく)

dangerous; hostile;険悪

險峻(けんしゅん)

steep and rugged

險要(けんよう)

strategic stronghold; impregnable position

險阻(けんそ)

rugged terrain; difficult passage

險路(けんろ)

dangerous or difficult route

險難(けんなん)

danger and hardship

險所(けんしょ)

dangerous spot

險山

險峻(けんしゅん)な山道(やまみち)を進(すす)むには、相当(そうとう)な覚悟(かくご)が要(い)る。

Proceeding along the precipitous mountain path requires considerable resolve.

險要(けんよう)な地(ち)に城(しろ)を築(きず)いた。

They built a castle in an impregnable location.