tremulous
词根词缀：
tremble v. 发抖；摇动
trem 颤抖 + ble → 发抖；摇动
tremendous adj. 惊人的；巨大的
trem 颤抖 + end 末，尾 + ous …的 → 让人从头到尾颤抖的 → 惊人的
tremor n. 震动；小地震
trem 颤抖 + or 表名词 → 震动；小地震
tremulous adj. 发抖的
trem 颤抖 + ul + ous 有…性质的，关于…的 → 发抖的
数据来源：新东方英语词汇速记大全
相关例句：
The old lady's quavering voice; spoke timidly in a tremulous voice.
老女人颤抖的声音；说话时声音因害羞而颤抖。
The old man's voice had become at once tremulous.
老人的声音一下子变得颤抖了。
Men are timid, tremulous, rather soft and submissive, easy in their very henlike tremulousness.
男人胆小发抖，非常温驯，并如母鸡一样瑟瑟发抖时才感到自在。
No bone had he to bind him, His speech was like the push Of numerous humming-birds at once His countenance a billow, His fingers, if he pass, Let go a music, as of tunes Blown tremulous in glass.
没有骨头把它捆扎起来，它的话就像大群的蜂鸟同时拥拥挤挤它的容貌是一阵巨浪，它的手指，如果经过，会释放出一曲音乐，那曲调仿佛从玻璃中颤抖地吹出。
His voice was too tremulous, the poise of his feelings too doubtful.
他的声音太激动了，他感情的宁静太可疑了。
Jack's voice went on tremulous yet determined.
杰克接着讲下去，声音虽颤抖但却坚定。