WordReference Random House Learner's Dictionary of American English © 2026
in•sol•u•ble /ɪnˈsɑlyəbəl/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2026- (of a substance) that cannot be dissolved:insoluble salts.
- (of a problem, crime, etc.) that cannot be solved:an insoluble mystery.
in•sol•u•ble
(in sol′yə bəl),USA pronunciation adj.
in•sol′u•bil′i•ty, in•sol′u•ble•ness, n.
in•sol′u•bly, adv.
- incapable of being dissolved:insoluble salts.
- incapable of being solved or explained:an insoluble problem.
- Latin. See in-3, soluble
- Middle French insoluble
- Latin insolūbilis; replacing Middle English insolible
- 1350–1400
in•sol′u•bly, adv.