The Austronesian Comparative Dictionary

*nawnáw to dissolve something in water; swish around in water

PPh nawnáw to dissolve something in water; swish around in water

WMP
Ibaloy nawnaw-an to swish, move water around in a container (as basin, pot) to give it a cursory cleaning
nawnaw-en to dissolve something --- esp. of something that requires little stirring (as starch into water, scrambling eggs)
Pangasinan nawnáw dissolve, diminish in volume, as sugar, salt, etc. when exposed to the atmosphere
Ilokano nawnáw to dissolve; melt; to dilute in liquids
Cebuano nawnáw put something in a liquid and swish it around (as clothes in soapy water)