1. A quick and penetrating intelligence; SYN. acuity, sharpness, keenness.
2. The quality of having a sharp edge or point.
3. A sensitivity that is keen and highly developed

ETYM From Fine.
1. Having a very fine texture; SYN. powderiness.
2. The property of being very narrow or thin; SYN. thinness.
3. The quality of being very good indeed; SYN. choiceness.

1. The quality or state of being nice
2. An elegant, delicate, or civilized feature
3. A fine point or distinction; subtlety
4. Careful attention to details; delicate exactness; precision
5. Delicacy of taste or feeling; fastidiousness

ETYM Old Eng. sotelte, sutilte, Old Fren. sotillete, Latin subtilitas. Related to Subtle, Subtility.
The quality of being difficult to detect or analyze; SYN. niceness.