Much watching of Louisa, and much consequent observation of her impenetrable demeanour, which keenly whetted and sharpened Mrs. Sparsit’s edge, must have given her as it were a lift, in the way of inspiration.
There are no more uses of "whet" in the book.
Show samples from other sources
Because there is a force that wants you to realize your destiny; it whets your appetite with a taste of success.
Paulo Coelho -- The Alchemist
She says every time I lose it in front of the press, I only whet their appetites for more.