Where does “fiastra” come from?

fiastra (Asturian) comes from Asturian fiastru, from Late Latin filiaster, from Latin fīlius, from Old Latin fīlios, from Proto-Indo-European dʰeh₁y-li-os, from Proto-Indo-European dʰeh₁(y)- — to suckle, nurse.

fiastra (Asturian): stepdaughter

Definitions

stepdaughter

Ancestry of “fiastra”, step by step

Step	Language	Word	Meaning
1	Asturian	fiastru	stepson
2	Late Latin	filiaster	stepson; son-in-law; nephew, sister's son
3	Latin	fīlius	—
4	Old Latin	fīlios	—
5	Proto-Indo-European	dʰeh₁y-li-os	sucker
6	Proto-Indo-European	dʰeh₁(y)-	to suckle, nurse

Every word from Proto-Indo-European dʰeh₁(y)- →

fiastra — Etymology, Origin & Word History | Etymology Explorer