Adjective

(er)

That returns rapidly to its original form (as a spring does) after being bent, compressed, stretched, etc.

The soft peat was springy under her feet.

{{quote-Fanny Hill, part=5 , We had now reach'd the closest point of union; but when he backened to come on the fiercer, as if I had been actuated by a fear of losing him, in the height of my fury I twisted my legs round his naked loins, the flesh of which, so firm, so springy to the touch, quiver'd again under the pressure}}