subterraneanly

/ˌsʌbtəˈreɪniənli/
adverb
  1. In a way that is under the surface of the earth.
    • The water flows subterraneanly through porous rock before emerging as a spring.
    • The roots spread subterraneanly, far beyond the tree's branches.
    • The ants built their colony subterraneanly, creating a complex network of chambers.
  2. In a hidden or secret manner.
    • Influence was exerted subterraneanly, through whispers and anonymous donations.
    • The disease spread subterraneanly for months before anyone noticed the symptoms.
    • The rebellion grew subterraneanly, with meetings held in basements and back rooms.
Antonyms
What does "subterraneanly" mean? | whatsthatwordmean | whatsthatwordmean