Her face was captivating by reason of a certain frankness of expression and a contradictory subtle play of features.
Who can tell what metals the gods use in forging the subtle bond which we call sympathy, which we might as well call love.
There may have been—there must have been—influences, both subtle and apparent, working in their several ways to induce her to do this; but the most obvious was the influence of Adele Ratignolle.
A subtle current of desire passed through her body, weakening her hold upon the brushes and making her eyes burn.
The champagne was cold, and its subtle fumes played fantastic tricks with Edna’s memory that night.
There was nothing subtle or hidden about her charms; her beauty was all there, flaming and apparent: the spun-gold hair that comb nor confining pin could restrain; the blue eyes that were like nothing but sapphires; two lips that pouted, that were so red one could only think of cherries or some other delicious crimson fruit in looking at them.
He observed his hostess attentively from under his shaggy brows, and noted a subtle change which had transformed her from the listless woman he had known into a being who, for the moment, seemed palpitant with the forces of life.
not obvious, but understandable by someone with adequate sensitivity and relevant knowledge (perhaps depending upon fine distinctions)
capable of understanding things that require sensitivity and relevant knowledge (perhaps understanding fine distinctions)