Underground

usgb/ˌʌndərˈɡraʊnd/Volume
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LampPro Tip 1/2
Physical SpacePlay
Used to describe spaces or objects literally beneath the ground surface. SlideThe old city has many underground passages.
LampPro Tip 2/2
Not VisiblePlay
Implies something hidden, as it cannot be seen from above ground. SlideYou can't see the underground cables, but they are essential.