Abysmal

a.

1.

Pertaining to, or resembling, an abyss; bottomless; unending; profound. Geology gives one the same abysmal extent of time that astronomy does of space. - Carlyle.

Adj.	1.	abysmal - very great; limitless; "abysmal misery"; "abysmal stupidity"
	2.	abysmal - so deep as to be unmeasurable; "the abyssal depths of the ocean" Synonyms: abyssal, unfathomable

Atlantean, Brobdingnagian, Cyclopean, Gargantuan, Herculean, Homeric, abyssal, appalling, astronomic, awful, bottomless, cavernous, colossal, deep as hell, dreadful, elephantine, enormous, epic, fathomless, gaping, giant, giantlike, gigantic, heroic, huge, illimitable, immense, jumbo, mammoth, mighty, monster, monstrous, monumental, mountainous, plumbless, plunging, prodigious, soundless, terrible, titanic, towering, tremendous, unfathomable, unfathomed, unsounded, vast, without bottom, yawning