erru (2)  (Sumerian origin ;)

[Country → Agriculture]

1) : a ring , a band ; 2) a ring / a washer for peg ; 3) a headband - metal or cloth- (also arû , errēt qaqqadē) ; 4) (Nuzi) : an (animal) enclosure / pen ; 5) an enclosed plot of land ;

Cf. erretu (2)