Where does “missfoster” come from?

missfoster (Swedish) comes from Swedish foster, from Old Norse fóstr, from Proto-Germanic fōstrą, from Proto-Indo-European peh₂- — to protect; to shepherd.

Ancestry of “missfoster”, step by step

Step	Language	Word	Meaning
1	Swedish	foster	fetus
2	Old Norse	fóstr	rear, raise; nurturing, education, alimony, child...
3	Proto-Germanic	fōstrą	fostering
4	Proto-Indo-European	peh₂-	to protect; to shepherd

Every word from Proto-Indo-European peh₂- →

missfoster — Etymology, Origin & Word History | Etymology Explorer