Proto-Baltic: *erk-š-ēt-ia- c., *erk-š-ia- c., *erk-ia- c.
Meaning: a k. of thorny bush/tree
Lithuanian: erškē̃ti-s (gen. -čiō), erškẽti-s, erškētī̃-s, dial. arškē̆ti-s 'Dorn, Schlehdornbusch'
Lettish: ẽršk̨is, ẽrkšis, ẽrkšk̨is, pl. ērši 'Dornstrauch, Dorn, Stachel', ẽrcis, ẽrk̨is, ērcietis, pl. ę̄rc[a]šas 'Wacholder'