Where does “trädstam” come from?

trädstam (Swedish) comes from Swedish träd, from Old Norse þráðr, from Proto-Germanic þrēduz, from Proto-Indo-European treh₁-tu-, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

trädstam (Swedish): tree trunk

Definitions

tree trunk

Ancestry of “trädstam”, step by step

trädstam traces back through two separate lines of ancestry.

via Swedish träd

Step	Language	Word	Meaning
1	Swedish	träd	tree; tree; plant reminiscent of a tree in the...
2	Old Norse	þráðr	thread; past participle of þreyja; past...
3	Proto-Germanic	þrēduz	thread, twisted fibre
4	Proto-Indo-European	treh₁-tu-	—
5	Proto-Indo-European	terh₁-	to rub, turn; to drill, pierce

via Swedish stam

Step	Language	Word	Meaning
1	Swedish	stam	trunk of a tree; stem; tribe, clan
2	Proto-Germanic	stamniz	stem, tree stalk
3	Proto-Indo-European	*steh₂-	—

Every word from Proto-Indo-European terh₁- →Every word from Proto-Indo-European treh₁-tu- →Every word from Proto-Germanic þrēduz →