Origin: Latin suffix -al
Abyssal has 3 different meanings across 1 category:
relating to ocean depths from 2000 to 5000 meters
resembling an abyss in depth; so deep as to be unmeasurable
"the abyssal depths of the ocean"
Belonging to, or resembling, an abyss; unfathomable.
The word "abyssal" comes from Medieval Latin abyssalis, which combines the Latin abyssus meaning "abyss" with the suffix -alis. It was first used in English in the 1690s to describe things related to a deep chasm or the depths of the sea.