eu > en 
1 mend. (aurreko izen-sintagmak -ik kasu-atzizkia duela) in the absence of, for want of
hoberik ezean, hura hautatu behar izan zuen: in the absence of anything better, she had to choose that one
2 mend. (aditzaren era burutuaren ondoren) unless; if
ez ziren handik jaitsiko, goserik izan ezean: there was no way they were coming down, unless they were hungry
geuk egin ezean, ez du beste inork egingo: if we don't do it, no one else will
ezean