Impossible to know or fathom:
The definition of mysterious is something that is not understood or known.
Causing numbness, esp. in feeling or in mental or emotional response
The act by which things are confounded, or confused.
Not worth considering because of being socially unacceptable, too difficult, or too risky:
That cannot be conceived; that cannot be thought of, understood, imagined, or believed
Overpowering in effect or strength:
Amazing or worthy of special notice
Unacceptable or outrageous
An unknown person, especially an Unknown Soldier:
Filled up; brimming over:
Of such a character as to overwhelm
Find another word for mind-boggling. In this page you can discover 34 synonyms, antonyms, idiomatic expressions, and related words for mind-boggling, like: baffling, perplexing, incomprehensible, puzzling, stunning, mysterious, numbing, confounding, unthinkable, mind-blowing and jaw-dropping.