Proto-Baltic: *ir̂- (1) vb. tr., *ir̂-tl-a-, -ia- (1) c., *ir-kl-ā̂, -iā̃ f.; *ar-t-w-iā̃ f.
Meaning: oar, row
Lithuanian: ìrti (ìria, ī́rē) `rudern', ìrkla-s `Ruder'
Lettish: ir̃t (ir̨u, īru) 'rudern', ir̃kls, ir̃klis, irkla, irkle 'Ruder; Steuer'
Old Prussian: artwes pl. f. 'Schiffsreise (= 'Kriegsfahrt zu Wasser')' V. 413
