As an adjective subterranean
is below ground, under the earth, underground.
As a noun aflaj is
an irrigation system which catches mountain water and controls its movement down man-made subterranean channels, found in Oman.
subterranean
English
Adjective
(
en adjective)
below ground, under the earth, underground
Synonyms
* subterraneous, subterrene, underground
Related terms
* terranean
aflaj
English
Alternative forms
* aflaaj
Noun
(-)
(agriculture) An irrigation system which catches mountain water and controls its movement down man-made subterranean channels, found in Oman.
Related terms
* falaj
Anagrams
*