adjective, sub·tler, sub·tlest.
Origin of subtle
Examples from the Web for subtleness
The charm of woman, too, lies partly in her subtleness in matters of love.A Pair of Blue Eyes|Thomas Hardy
It nettled him to be put on the defensive, his subtleness openly contemned.Thirty|Howard Vincent O'Brien
He only knew the ethics of the deed was shaded with the subtleness of villainy.The Blind Spot|Austin Hall
One aspect of the recent stories of diabolism is the subtleness by which the evil is suggested.The Supernatural in Modern English Fiction|Dorothy Scarborough
He speaks, as well he might, of the inconstancy and subtleness of the people with whom we deal.The Mystery of Mary Stuart|Andrew Lang