Where does “*hrunkiju” come from?

*hrunkiju (Frankish) comes from Proto-Germanic hrunkijō, from Proto-Indo-European sḱer- — to caw, crow.

Ancestry of “*hrunkiju”, step by step

StepLanguageWordMeaning
1Proto-Germanichrunkijō—
2Proto-Indo-Europeansḱer-to caw, crow
Every word from Proto-Indo-European sḱer- →Every word from Proto-Germanic hrunkijō →