a person who believes or practises something …的信仰者;…的实行者 atheist 无神论者
a member of a profession or business activity 专业人员;…专家;从事…的人 dentist 牙医
a person who uses a thing …使用者 violinist 小提琴手
a person who does something 干…的人 plagiarist 剽窃者
Word Originfrom Old French -iste, Latin -ista, from Greek -istēs.