- insoluble
- adj1. indissoluble, undissoluble, indissolvable, undissolvable, unsoluble, infusible, unthawable, Archaic. irresoluble.2. insolvable, unsolvable, inexplicable, unexplainable, inextricable; puzzling, enigmatic, enigmatical, baffling, bewildering, perplexing, confounding, mystifying.3. impenetrable, incomprehensible, uncomprehens-ible, inapprehensible, past or beyond comprehension, beyond understanding, unknowable, incognizable, incognoscible, inscrutable, unfathomable, indecipherable, undecipherable, undiscoverable.4. hard, difficult, over one's head, Inf. tough; com- plex, complicated, perplexed, Inf. tricky; intricate, involved, labyrinthine, Byzantine, tangled, knotty, crabbed.5. mysterious, arcane, cryptic, perdu; oracular, sphingine, sphinxian, sphinxlike; mystic, mystical, cabalistic, transcendental, supernatural, preternatural.
A Note on the Style of the synonym finder. 2014.