Where does “штрај” come from?

штрај (Serbo-Croatian) comes from German Streu, from Norwegian Bokmål streve, from Old French estriver, from Frankish strīban, from Proto-Germanic strībaną, from Proto-Indo-European streybʰ-, from Proto-Indo-European ster- — sterile, infertile.

Definitions

Ancestry of “штрај”, step by step

StepLanguageWordMeaning
1GermanStreulitter; mulch
2Norwegian Bokmålstreveto strive (etter / for), struggle, slave, toil
3Old Frenchestriverto compete; to argue; to dispute; to get into an...
4Frankishstrībanto exert, to make an effort
5Proto-Germanicstrībanąto be stiff; stiffen; to exert; make an effort
6Proto-Indo-Europeanstreybʰ-to be stiff
7Proto-Indo-Europeanster-sterile, infertile
Every word from Proto-Indo-European ster-Every word from Proto-Indo-European streybʰ-Every word from Proto-Germanic strībaną