an abyss is a form of:

Protuberant



adjective
1.
(bulging or swelling out prominent) ដែលឡើងដុំ, ដែលកើជាដុំពក, នៃដុំពក
ENGLISH MEANING
adjective
1.
Prominent, or excessively prominent; bulging beyond the surrounding or adjacent surface; swelling; as, a protuberant joint; a protuberant eye.