en > eu 
/fɔː(r)/
1 prep. -entzat, -endako; -rako
2 prep. [on behalf of] -en ordez
3 prep. -en alde; -gatik
4 prep. [concerning sb/sth] -i dagokionez/dagokiolarik
5 prep. [employed by] -n
6 prep. [showing purpose] -teko, -tzeko, -rako
7 prep. [reason] -lako, -gatik
8 prep. [direction] -ra, -rako, -rantz
9 prep. -en truke
10 prep. [considering what can be expected] -t(z)eko, -rako
11 prep. -en
12 prep. [a period of time] -rako
13 prep. [a concrete date] -rako