So Roger Chillingworth—the man of skill, the kind and friendly physician—strove to go deep into his patient’s bosom, delving among his principles, prying into his recollections, and probing everything with a cautious touch, like a treasure-seeker in a dark cavern.
There are no more uses of "probe" in the book.
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There was a congressional probe into the scandal.
She probed beneath the gum line as she examined his teeth.