eu > en 
1 mend. although, even though, though; even (if); in spite of, despite (followed by a noun); despite the fact that, in spite of the fact that
hotz egin arren, hondartzara joan nintzen: although it was cold, I went to the beach
urteak badituen arren, oraindik ere bizitza aktiboa darama: in spite of his age, he still leads an active life
2 mend. (aditz-izenari loturik) to + inf., in order to + inf
hura pozik ikustearren, edozer egingo nuke: I'd do anything to see him happy
adb. please
ez ezer esan, arren: please don't say a word
arren