Sit on or Brood Eggs
This page is the CodyCross answer for the clue below from Futuristic City , Group 989, Puzzle 1 (Commuter Tunnels).
Question is: Sit on or Brood Eggs
and the answer is: INCUBATE
Word Meaning:
INCUBATE — (transitive) To brood, raise, or maintain eggs, organisms, or living tissue through the provision of ideal environmental conditions.
Definitions from Wiktionary.