词根词缀：echo-, ech-

【来源及含义】Greek: sound, noise; especially a returned sound; repetition, imitation

【同源单词】anecho, anechoic, catecheses, catechesis, catechetical, catechism

词根词缀：-ism, -ismus

【来源及含义】Greek, ismos; Latin, ismus: a suffix: belief in, practice of, condition of, process, characteristic behavior or manner, abnormal state, distinctive feature or trait

【同源单词】abaptism, abolitionism, abortionism, abrakophilism, absenteeism, absolutism