词根：trepid = trembling （颤抖）
trepidation 胆怯
intrepid 大无畏的
词根词缀：trepid-
【来源及含义】Latin: agitated, alarmed, restless, anxious, solicitous; fear, fearful, fright; terror; consternation
【同源单词】intrepid, intrepidity, intrepidly, intrepidness, trepid, trepidant