With a little ingenuity and vision, he had made it all but impossible for anyone in the squadron to talk to him, which was just fine with everyone, he noticed, since no one wanted to talk to him anyway.
There are no more uses of "ingenuity" in the book.
Show samples from other sources
He exercised great ingenuity in making excuses for missing class.
It will take more than ingenuity to clean this up. We’re going to have to admit our mistake.