en > eu 
/ˈweðə(r)/
1 conj. [choice, doubt] -(e)n; -(e)nez, -(e)netz
I'm not sure whether he'll come (or not): ez nago ziur etorriko denetz
tell me whether you need us or not: esaidazu behar gaituzun ala ez
2 conj. [no matter if] dela... dela...
it's very easy to get to town, whether by bus, by train or on foot: oso erraza da hirigunera iristea, dela autobusez, dela trenez, dela oinez
I'll go whether you like it or not: joan egingo naiz, zuk nahi ala ez