Where does “Mestworm” come from?

Mestworm (Plautdietsch) comes from Plautdietsch Worm, from Middle Low German worm, from Old Saxon wurm, from Proto-Germanic wurmiz, from Proto-Indo-European wr̥mis, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

Mestworm (Plautdietsch): slug (invertebrate animal)

Definitions

slug (invertebrate animal)

Ancestry of “Mestworm”, step by step

Mestworm traces back through two separate lines of ancestry.

via Plautdietsch Worm

Step	Language	Word	Meaning
1	Plautdietsch	Worm	worm
2	Middle Low German	worm	—
3	Old Saxon	wurm	a serpent or snake; a creeping insect, maggot,...
4	Proto-Germanic	wurmiz	worm; serpent, snake
5	Proto-Indo-European	wr̥mis	worm
6	Proto-Indo-European	wer-	to burn; to cover, heed, notice; squirrel

via Plautdietsch Mest

Step	Language	Word	Meaning
1	Plautdietsch	Mest	dung, manure
2	Middle Low German	mist	—
3	Old Saxon	mist	—
4	Proto-West Germanic	*mistu	—

Every word from Proto-Indo-European wer- →Every word from Proto-Indo-European wr̥mis →Every word from Proto-Germanic wurmiz →