armr -s, -ar m
1.
arm; leggja arma um e-n, to embrace (of a woman); koma á arm e-m, to come into one's embraces (of a woman marrying);
2.
the wing of a body, opp to its centre; armar úthafsins, the arms of the ocean, viz bays and firths; armr fylkingar, a wing of an army
