The depth of despair in her eyes was unfathomable.
mystery
Frequency:
65
%
The disappearance of the plane remains unfathomable.
vastness
Frequency:
60
%
The vastness of the universe is unfathomable.
complexity
Frequency:
50
%
The complexity of the human brain is unfathomable.
magnitude
Frequency:
45
%
The magnitude of the disaster was unfathomable.
Idiomatic Expressions for unfathomable
Phrase: unfathomable mystery
Meaning: refers to a situation or phenomenon that is so puzzling or complex that it cannot be comprehended or explained
Usage: The disappearance of the ancient civilization remains an unfathomable mystery to archaeologists.