1. (a.) Shaking; shivering; quivering; as, a tremulous limb\; a tremulous motion of the hand or the lips; the tremulous leaf of the poplar.

2. (a.) Affected with fear or timidity; trembling.

afraid agitated aguish all shook up all-overish anxious aquiver aspen bashful blurred breathy chattering choked choking cowardly croaking diffident doubtful drawling drawly dysphonic faltering fearful fearing fearsome fidgeting fidgety fluttery frightened goosy guttural harsh hawking hesitant hoarse in a quiver in fear inarticulate indistinct jittery jumpy lisping mispronounced mousy muzzy nasal nervous palpitating palsied quaking quavering quavery quivering quivery rabbity scared scary shaking shaky shivering shivery shook up shrinking shuddering shy skittery skittish snuffling startlish stifled strangled succussatory succussive thick throaty timid timorous trembling trembly tremulant trepidant trigger-happy twangy twitchy twittery unsteady unsure velar vibrating wavering wobbly worried