gen. byrjar, nom. pl. byrir, acc. byri: [Swed.-Dan. bör; cp. usage of Gr. ουριος]:—a fair wind; it is freq. used in pl., esp. in the impers. phrase, e-m gefr vel byri (acc. pl.), one gets a fair wind, rarely, and less correct, byr (acc. sing.), Nj. 10, Vápn. 9, but sing. Nj. 4, Eg. 98; byri gefr hann brögnum, Hdl. 3; með hinum beztuni byrjum, Bs. i. 781; bíða byrjar, Fms. i. 131; liggja til byrjar, to lie by for a fair wind, Eg. 183; byrr rennr á, a fair breeze begins to blow; þá rann á byrr ok sigldu þeir, Nj. 135, Eg. 158; þá féll byrrinn, Eb. 8; þá tók byrr at vaxa, Eg. 390: allit, naut. phrases, blásandi byrr, blíðr byrr, beggja skauta byrr; hagstæðr byrr, fagr byrr. hægr, óðr byrr, Hm. 89; hrað-byri, etc.: also metaph., hafa góðan, mikinn, lítinn byrr, to be well, much, little favoured: in poetry in many compds, byrjar drösull, the horse of the wind, a ship; byr-skíð, byr-rann. a ship; byrr always denotes the wind on the sea. byrjar-gol, n. a fair breeze, Fms. ix. 21.