- fathomless
- adj1. bottomless, soundless, unsounded, unfathomed, plumbless, measureless; abysmal, cavernous, plunging; deep-sea, deep as the sea or ocean, deep as a well.2. impenetrable, incomprehensible, uncomprehen-sible, past or beyond comprehension, unknowable, inscrutable, unfathomable, incognizable, indecipherable, undecipherable, beyond understanding; obscure, dark, dim, vague, nebulous; mysterious, arcane, inexplicable, unexplainable, insolvable, insoluble, unaccountable, Obs. inextricable; puzzling, enigmatic, enigmatical.
A Note on the Style of the synonym finder. 2014.