Where does “bat etorri” come from?

bat etorri (Basque) comes from Basque bat, from Proto-Basque bade — one, some.

bat etorri (Basque): to agree

Definitions

  1. to agree

Ancestry of “bat etorri”, step by step

bat etorri traces back through two separate lines of ancestry.

via Basque bat

StepLanguageWordMeaning
1Basquebata, an, some; one; some
2Proto-Basquebadeone, some

via Basque etorri

StepLanguageWordMeaning
1Basqueetorrito come
Every word from Proto-Basque bade →Every word from Basque bat →
bat etorri — Etymology, Origin & Word History | Etymology Explorer