Where does “tervahauta” come from?

tervahauta (Finnish) comes from Finnish terva, from Proto-Finnic terva, from Proto-Indo-European dérw-o-m, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

tervahauta (Finnish): tar kiln dry distillation oven, historically used in Scandinavia for producing tar from wood

Definitions

tar kiln dry distillation oven, historically used in Scandinavia for producing tar from wood

Ancestry of “tervahauta”, step by step

tervahauta traces back through two separate lines of ancestry.

via Finnish terva

Step	Language	Word	Meaning
1	Finnish	terva	tar
2	Proto-Finnic	terva	tar
3	Proto-Indo-European	dérw-o-m	—
4	Proto-Indo-European	dóru	tree
5	Proto-Indo-European	drew-	hard, firm, strong, solid; hard, fast; tree

via Finnish hauta

Step	Language	Word	Meaning
1	Finnish	hauta	grave, tomb; trench; kiln, in the compound term...
2	Proto-Germanic	sauþaz	boiling; seething; wellspring; fountain; source;...
3	Proto-Indo-European	h₂sewt-	to roil; to move about, roil, seethe

Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →Every word from Proto-Indo-European dérw-o-m →