The Collaborative International Dictionary
Subtleness
Subtleness \Sub"tle*ness\, n. The quality or state of being subtle; subtlety.
Wiktionary
subtleness
n. The property of being subtle, of avoiding brute force and instead being clever or skillful.
Usage examples of "subtleness".
The charm of woman, too, lies partly in her subtleness in matters of love.
He did so with a Borgia-like cruelty and a Machiavellian subtleness, plus solid American business ' know-how.