tremor
n.
late 14c., "terror," from Old French tremor "fear, terror, quaking" (13c.), from Latin tremorem (nominative tremor) "a trembling, terror," from tremere (see tremble, v.). Sense of "an involuntary shaking" first recorded 1610s and probably represents a re-introduction from Latin.
〔李〕[trem =to tremble发抖，震颤；-or ⇒“the state of trem-bling发抖的状态”→] n. ①an involuntary shaking or trem-bling发抖，震颤