Where does “gräsänka” come from?

gräsänka (Swedish) comes from Swedish gräs, from Old Norse gras, from Proto-Germanic grasą, from Proto-Indo-European ǵʰreh₁- — to become green, grow; to grow; to green, to grow.

gräsänka (Swedish): a married woman (or, in an extended sense, a woman in a long-term relationship) whose partner is temporarily away; a grass widow

Definitions

a married woman (or, in an extended sense, a woman in a long-term relationship) whose partner is temporarily away; a grass widow

Ancestry of “gräsänka”, step by step

gräsänka traces back through two separate lines of ancestry.

via Swedish gräs

Step	Language	Word	Meaning
1	Swedish	gräs	grass; any plant of the family Poaceae; grass,...
2	Old Norse	gras	grass, herbage; a herb, usually with special...
3	Proto-Germanic	grasą	grass
4	Proto-Indo-European	ǵʰreh₁-	to become green, grow; to grow; to green, to grow

via Swedish änka

Step	Language	Word	Meaning
1	Swedish	änka	a widow
2	Old Swedish	ænkia	widow

Every word from Proto-Indo-European ǵʰreh₁- →Every word from Proto-Germanic grasą →Every word from Old Norse gras →