Where does “tandskydd” come from?

tandskydd (Swedish) comes from Swedish tand, from Old Swedish tan, from Old Norse tǫnn, from Proto-Germanic tanþs, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

tandskydd (Swedish): a mouthguard, UK a gumshield (device to protect the teeth and gums from impact, during sports or the like)

Definitions

a mouthguard, UK a gumshield (device to protect the teeth and gums from impact, during sports or the like)

Ancestry of “tandskydd”, step by step

tandskydd traces back through two separate lines of ancestry.

via Swedish tand

Step	Language	Word	Meaning
1	Swedish	tand	a tooth; in a mouth or on a saw; a tooth, a dent,...
2	Old Swedish	tan	tooth
3	Old Norse	tǫnn	tooth
4	Proto-Germanic	tanþs	tooth
5	Proto-Indo-European	h₃dónts	tooth
6	Proto-Indo-European	h₁ed-	to eat

via Swedish skydd

Step	Language	Word	Meaning
1	Swedish	skydd	a protection; something that covers or protects;...
2	Swedish	skydda	protect
3	Swedish	beskydda	to protect

Every word from Proto-Indo-European h₁ed- →Every word from Proto-Indo-European h₃dónts →Every word from Proto-Germanic tanþs →