godan verb (-su)
knead again; remix
Used for physically working a substance (dough, clay, etc.) a second time, or for reworking a mixture.
パン生地を練り返して、もう一度発酵させる。
Knead the bread dough again and let it rise once more.
粘土を練り返して柔らかく
Knead the clay again to soften it.