Where does “????” come from?

???? (Old Marathi) comes from Maharastri Prakrit ????, from Sanskrit श्वश्रू, from Proto-Indo-Aryan swaśrúH, from Proto-Indo-Iranian swaćrúH, from Proto-Indo-European sweḱrúh₂, from Proto-Indo-European swéḱuros — father-in-law.

Ancestry of “????”, step by step

StepLanguageWordMeaning
1Maharastri Prakrit????mother-in-law
2Sanskritश्वश्रूa mother-in-law
3Proto-Indo-AryanswaśrúH—
4Proto-Indo-IranianswaćrúHa mother-in-law
5Proto-Indo-Europeansweḱrúh₂mother-in-law
6Proto-Indo-Europeanswéḱurosfather-in-law

Words derived from “????”

Every word from Proto-Indo-European swéḱuros →Every word from Proto-Indo-European sweḱrúh₂ →Every word from Proto-Indo-Iranian swaćrúH →