eu > en
1 [batera, batean] at the same time, simultaneously
omena eta ondasuna irabazi ditu behingoan: she has become famous and rich at the same time
2 [bat-batean] suddenly; (ezezko testuinguruetan) right away, at once
behingoan hil zen: he died suddenly
ez haiz behingoan etorri: you didn't come at once