aspen, n. [AS. æsp, æps; akin to OHG. aspa, Icel. ösp, Dan. æsp, Sw. asp, D. esp, G. espe, äspe, aspe; cf. Lettish apsa, Lith. apuszis.].
One of several species of poplar bearing this name, especially the Populus tremula, so called from the trembling of its leaves, which move with the slightest impulse of the air. [1913 Webster]
Of or pertaining to the aspen, or resembling it; made of aspen wood. [1913 Webster
"Nor aspen leaves confess the gentlest breeze."
chattering, palsied, quaking, quavering, quavery, quivering, quivery, shaking, shaky, shivering, shivery, shuddering, succussatory, succussive, trembling, trembly, tremulous, vibrating, wobbly