stygian

那条僻静的小路在暴雨中显得格外阴森可怖。

The secluded path looked ___stygian under the heavy storm.

他们下到漆黑一片的地窖，手电筒光束以外什么都看不见。

They descended into the ___stygian cellar, unable to see anything beyond the flashlight beam.

废弃的矿井洞口通向一片吞噬一切光线的漆黑虚空。

The abandoned mine shaft opened into a ___stygian void that swallowed all light.