词根词缀：fac-, facil-, fact-, feas-, -feat, -fect, -feit, -facient, -faction, -fic-, -fy, -ficate, -fication

【来源及含义】Latin: to make, to do, to build, to cause, to produce; forming, shaping

【同源单词】Ab officio et beneficio, abortifacient, absorbefacient, absorbifacient, acoustoelectric effect, affair

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

词根词缀：pac-, peac-, peas-

【来源及含义】Latin: peace, peaceful, calm, quiet; eased anger or agitation

【相关词根词缀】 Cross references directly, or indirectly, involving "calm, calmness, peace, quiet": plac-; quies-, quiet-; seren-.

【同源单词】Abi in pace, appeasableness, appeasably, appease, appeasement, appeaser