Synonyms for abysmal

Adjective

1. abysmal, immeasurable (vs. measurable), unmeasurable, immensurable

usage: very great; limitless; "abysmal misery"; "abysmal stupidity"

2. abysmal, abyssal, unfathomable, deep (vs. shallow)

usage: so deep as to be unmeasurable; "the abyssal depths of the ocean"