delicate;not easy to notice,understand,or explain
(of a person or their behaviour) behaving in a clever way, and using indirect methods, in order to achieve sth
very clever in noticing and understanding
"his whole attitude had undergone a subtle change"
"a subtle difference"
"that elusive thing the soul"
"a subtle mind"
"glaucoma is an insidious disease"
"a subtle poison"
Many inconsistencies are too subtle for the detection of an ordinary mind.
出自： A. Bain
A change had gradually taken place in Hannah..subtle but unmistakable.
出自： P. Gallico
She smiled..that subtle mocking in her eyes.
出自： J. Herbert