subtlety
131Subtilization — Sub til*i*za tion, n. [Cf. F. subtilization.] 1. The act of making subtile. [1913 Webster] 2. (Old Chem.) The operation of making so volatile as to rise in steam or vapor. [1913 Webster] 3. Refinement; subtlety; extreme attenuation. [1913… …
132Subtleness — Sub tle*ness, n. The quality or state of being subtle; subtlety. [1913 Webster] …