词根词缀：duo-, du-

【来源及含义】Latin: two, double; a word element for the number "2"

【同源单词】conduplicate, deuce, double, double-dealing, doublet, doubletalk

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