Abysmal
Part of speech: adjective
Definition: Pertaining to, or resembling an abyss; bottomless; unending; profound; fathomless; immeasurable. Extremely bad.
Example sentence: On reflection, I think the 1980s were a dreadful, abysmal time.
Immeasurable
Part of speech: adjective
Definition: impossible to measurevast
Example sentence: The unworthy successor of Peter who desires to benefit from the immeasurable wealth of Christ feels the great need of your assistance, your prayers, your sacrifice, and he most humbly asks this of you.