Where does “socrișor” come from?

socrișor (Romanian) comes from Romanian socru, from Latin socrus, from Latin socer, from Proto-Indo-European sweḱrúh₂, from Proto-Indo-European swéḱuros — father-in-law.

Ancestry of “socrișor”, step by step

Step	Language	Word	Meaning
1	Romanian	socru	father-in-law
2	Latin	socrus	mother-in-law
3	Latin	socer	father-in-law
4	Proto-Indo-European	sweḱrúh₂	mother-in-law
5	Proto-Indo-European	swéḱuros	father-in-law

Every word from Proto-Indo-European swéḱuros →Every word from Proto-Indo-European sweḱrúh₂ →Every word from Latin socer →