Proto-Baltic: *ar, *ir
Meaning: part./conj.
Old Lithuanian: er = Fragepart. ar̃ und = ir̃ 'auch';
Lithuanian: ir̃ `und, auch', ar̃ 'ob, oder', dial. 'und, auch'
Lettish: ir `und; auch, sogar'; ar, arî, ari 'auch', ar 'mit'; (Anzen) ęr, ę (< ęr) 'auch'
Old Prussian: ir `und, auch'
