n. 25B6; noun
the subtlety of the flavour : DELICACY, delicateness, subtleness; understatedness, mutedness, softness.
classification is fraught with subtlety : FINENESS, subtleness, niceness, nicety, nuance.
the subtlety of the human mind : ASTUTENESS, keenness, acuteness, sharpness, canniness, shrewdness, perceptiveness, discernment, discrimination, percipience, perspicacity, wisdom, cleverness, intelligence.
the subtlety of their tactics : INGENUITY, cleverness, skilfulness, adroitness, cunning, guile, craftiness, wiliness, artfulness, deviousness.