abysmal
1. [ adjective ] very great; limitless
Examples:

"abysmal misery" "abysmal stupidity"

Related terms: immeasurable
2. [ adjective ] so deep as to be unmeasurable; unfathomable
Synonyms: unfathomable abyssal
Examples:

"the abyssal depths of the ocean"

Related terms: deep
Similar spelling:   abysmally
  abysm
  absently
  abashment
  abasement