boggle
verb (used with object)
to overwhelm or bewilder, as with magnitude, complexity, or strangeness.
Used to describe an ongoing action or continuous state that was happening at a specific time in the past.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The minister himself seemed to wander, and at times, when Lemuel forced a return to him, he thought he was boggling strangely.
From The Minister's Charge by William Dean Howells