“利器”的反义词：钝器。...

拙匠无利器.A bad shearer never had a good sickle.市内利器伤人案增多,警方甚感忧虑.The police are worried about the increase in the number of stabbings in the city.一切工具都是危险的利器.All tools are in one sense edge - tools, and are dangerous....

“利器”的英语可以翻译为：edge tool ...