(p. pr. & vb. n.) of Vibrate.

aspen ceaseless chattering constant continual fluctuant fluctuating fluctuational full harmonic incessant libratory machine gun mellow nutational oscillating oscillatory palsied pendular pendulous perennial periodic perpetual plangent pulsating pulsing quaking quavering quavery quivering quivery rapid regular repeated resonant resonating rich rolling shaking shaky shivering shivery shuddering sonorous staccato steady stuttering succussatory succussive sustained throbbing trembling trembly tremulous unbroken unceasing unchanging unintermitted unintermittent unintermitting uninterrupted unremitting unstopped unvarying vacillating vacillatory vibrant vibratile vibratory wavering wobbly