Keating made it known, with an air of naive confidence which implied that he was only a tool, no more than Tim’s pencil or T-square, that his help enhanced Tim’s importance rather than diminished it and, therefore, he did not wish to conceal it.
There are no more uses of "enhance" in the book.
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This sauce will enhance the flavor of the meat.
The stunning victory over the Blue Devils enhanced the Bulldogs’ image as title contenders.