grax

The story

1. Old Norse · derived fromdregg
2. Norwegian Nynorsk · derived fromdragse“residue”
3. Norwegian Nynorsk · borrowed fromgrakse“residue from the production of fish or whale oil”
4. English todaygrax

Early 20th century. From Norwegian Nynorsk grakse (“residue from the production of fish or whale oil”), from Norwegian Nynorsk dragse (“residue”), from Old Norse dregg. Doublet of dreg.