Deep underground Synonyms

Deep replaced

main underground

Definitions for Deep

(adjective) extending far downward
(adjective) having a low musical pitch or range
(adjective) being beyond one's powers to know, understand, or explain

DU abbreviation

DU is an abbreviation for Deep Underground

What does DU stand for?

DU stands for "Deep Underground"

Underground replaced

deep basement

Definitions for Underground

(adjective) undertaken or done so as to escape being observed or known by others
(adjective) being, situated, or operating beneath the surface of the earth
(noun) a secret organization in a conquered country fighting against enemy forces