于 in, on, at / go to / surname 事 affair, matter, business / to serve / accident, incident 无 negative, no, not / KangXi radical 71 补 mend, patch, fix, repair, restore | Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
|---|---|---|---|---|---|---|
erfolglos [wu2 bu3] 
无补 nutzlos [yu2 shi4 wu2 bu3] 于事无补