永不 yǒngbù HSK7 never Origin Definitions Defs Strokes Stroke Words Sentences Sents 永不生锈的螺丝钉 yǒngbùshēngxiùdeluósīdīng a screw that never rusts A metaphor used to praise loyal and selfless contributors who work hard for the common good, famously applied to the model worker [[雷锋|雷鋒|lei2 feng1]].