subtle

US /ˈsʌt̬.əl/
UK /ˈsʌt̬.əl/
"subtle" picture
1.

so delicate or precise as to be difficult to analyze or describe

:
•
The painting had a subtle blend of colors.
•
There was a subtle change in his expression.
:
delicatefinefaintindirectimpliedunderstatednuancedelusiveimperceptible
2.

making use of clever and indirect methods to achieve something

:
•
He used a subtle approach to persuade them.
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Her subtle hints were finally understood.
:
clevercunningingeniousartfuldeviousindirecttactfuldiplomatic