溯 Strokes Write it Listen 溯 sù to paddle upstream, to go against the current; to trace the source; formerly HSK 7–9 13 strokes Radical 氵 Ideograph 1 word Built from氵shuǐwater朔shuòbeginning; the first day of the lunar month How it worksTo seek the source 朔 of a river 氵.