词根词缀：oper-, opus

【来源及含义】Latin: work

【相关词根词缀】 Cross references related to "work, toil" word families: argo-; ergasio-; ergo-; labor-; pono-; urg-.

【同源单词】co-operate, co-operation, co-operative, co-operativeness, ignioperation, inoperable