Very great; limitless.

Resembling an abyss in depth; so deep as to be unmeasurable.

synonyms: abyssal, unfathomable.

Roget 208: deep, deep seated; profound, sunk, buried; submerged etc. 310; subaqueous, submarine, subterranean, subterraneous, subterrene^†; underground.    bottomless, soundless, fathomless; unfathomed, unfathomable; abysmal; deep as a well; bathycolpian^†; benthal^†, benthopelagic^†; downreaching^†, yawning.    knee deep, ankle deep.    ... show more

Polish: niezgłębiony, bezdenny, przepastny, przepaścisty