subtlety

Short definition from Wiktionary

Noun

1. 1
   The quality of being subtle: The quality of being scarcely noticeable or difficult to discern. (of things)
2. 2
   The quality of being subtle: The quality of being done in a clever way that is not obvious or not direct; the quality of being carefully thought out. (of things)
3. 3
   The quality of being subtle: The quality of being able to achieve one's aims through clever, delicate or indirect methods. (of people)
4. 4
   The quality of being subtle: The quality of being able to notice or understand things that are not obvious. (of people)
5. 5
   An instance of being subtle, a subtle thing, especially a subtle argument or distinction.
6. 6
   An ornate medieval illusion dish or table decoration, especially when made from one thing but crafted to look like another.
7. 7
   The quality of being clever in surreptitious or deceitful behaviour; an act or argument that shows this quality.
8. 8
   A trick that creates a false appearance.
9. 9
   The property of having a low density or thin consistency.
10. 10
    The property of being able to penetrate materials easily.