Hypocrisy in anything whatever may deceive the cleverest and most penetrating man, but the least wide-awake of children recognizes it, and is revolted by it, however ingeniously it may be disguised.
Levin was confirmed in this generalization by observing that his brother did not take questions affecting the public welfare or the question of the immortality of the soul a bit more to heart than he did chess problems, or the ingenious construction of a new machine.
There are no more uses of "ingenious" in the book.
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It was an ingenious solution to the problem—as reliable as it was easy.
The first person to put wheels on a suitcase had an ingenious idea.