In a mindboggling manner; in such a way as to boggle the mind; so as to be beyond comprehension or understanding.(adverb)
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Use "mindbogglingly" in a sentence
"Applying for funds under the scheme burdens local authorities with "mindbogglingly" complex bureaucracy, Government sources said."
"Now I'm not saying we should or shouldn't have any more bailouts – I just think the timing of his statement is mindbogglingly ignorant."
"In other words, what makes this idea of limiting debt to grow the economy so mindbogglingly absurd is that a growth-focused economy requires increasing debt in order to function."