belowground

be·low·ground

B0180400 (bĭ-lō′ground′)adj. Situated or occurring below the surface of the ground: belowground telephone cables.

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be·low′ground′ adv.

belowground

(bɪˈləʊˌɡraʊnd) adjunderground

be•low•ground

(ˈbɪˈloʊˌgraʊnd)
adj. situated beneath the surface of the earth; subterranean. [1925–30]

Thesaurus

Adj.	1.	belowground - under the level of the ground; "belowground storage areas"; "underground caverns"undergroundsubsurface - beneath the surface; "subsurface materials of the moon"
	2.	belowground - underneath the ground; "most of his friends are now belowground"buried, inhumed, interred - placed in a grave; "the hastily buried corpses"