trem·or 
/ˈtrɛmɚ/ noun
plural trem·ors /ˈtrɛmɚ/ noun [count] 1 : a shaking movement of the ground before or after an earthquake
▪ Small tremors were still being felt several days after the earthquake. 2 : a slight shaking movement or sound that is caused especially by nervousness, weakness, or illness
▪ I heard a tremor in her voice. ▪ His tremors were caused by the disease.
▪ Small tremors were still being felt several days after the earthquake.
▪ I heard a tremor in her voice. ▪ His tremors were caused by the disease.
