One bore by way of address, Letter for my lady the Duchess So-and-so, of I don’t know where; and the other To my husband Sancho Panza, governor of the island of Barataria, whom God prosper longer than me.
"And may God so prosper it, Senor Don Quixote," said the duchess, "that we may always hear good news of your exploits; God speed you; for the longer you stay, the more you inflame the hearts of the damsels who behold you; and as for this one of mine, I will so chastise her that she will not transgress again, either with her eyes or with her words."
There are no more uses of "prosper" in the book.
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She is prospering at school.
My relatives worked hard all the time but never seemed to prosper.