Bleak, Dull or Drab
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2172, Puzzle 1 (Oxygen Detector).
Question is: Bleak, Dull or Drab
and the answer is: DREARY
Word Meaning:
DREARY — Drab; dark, colorless, or cheerless.
Definitions from Wiktionary.