蒼そう然ぜん

taru-adjective, adverb taking the 'to' particle

blue; bluish; dim

Literary taru-adjective describing a bluish, dim, or dusky appearance, often of vegetation, sky, or twilight. Rare in modern Japanese; mostly found in classical or poetic contexts.

• 夕ゆう暮ぐれの森もりは蒼そう然ぜんとしていた。

  The forest at dusk was dim and bluish.

• 蒼そう然ぜんたる山やま々やまが遠とおくに連つらなっている。

  Bluish mountains stretch out in the distance.