unfathomable
/ʌnˈfæðəməbəl/
adjective
- Impossible to understand or comprehend; extremely mysterious or deep.
- The universe is so vast that its size is unfathomable to the human mind.
- The complexity of the human brain remains unfathomable even to scientists.
- She stared into his unfathomable eyes, unable to guess what he was thinking.
- Impossible to measure the depth of (used literally for bodies of water or cavities).
- Divers avoided the unfathomable cave, fearing they would never reach the bottom.
- The unfathomable ocean trench plunged miles below the surface.
- Ancient sailors believed the unfathomable abyss was home to sea monsters.
Antonyms