Where does “worm” come from?

worm (Dutch) comes from Middle Dutch worm, from Old Dutch wurm, from Proto-West Germanic wurmi, from Proto-Germanic wurmiz, from Proto-Indo-European wr̥mis, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

worm (Dutch): worm, vernacular term for various, mostly legless...