污秽
wū huì · HSK 7
filthy
🗑️💩 污 (氵water + dirty) + 秽 (禾plant + foul) = two filth words stacked
污 carries the water radical 氵, the grime of polluted water; 秽 carries the grain radical 禾, foul rotting weeds choking a field. Doubling two filthy words intensifies to nasty, sordid, filthy.