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