1. The quality of being subtle; delicacy or fineness of perception, understanding, or expression
The subtlety of the painting lies in its use of light and shadow.
A subtileza da pintura está no uso da luz e sombra.
2. A fine or delicate distinction; a nuance
There are important subtleties in the legal language that should not be overlooked.
Existem subtilezas importantes na linguagem legal que não devem ser ignoradas.