[Meaning] a friend from among the enemy, one negotiating about ransom, if people are taken prisoner alive.[1]
Like Glaukos and Diomedes [Author, Myth].[2]
They used to call "spear-friends" also those who acquired guest-friend relationships in any manner. "Of such a man, with whom always our friendly hearth is shared." Or here [it is used] intensively, meaning [a hearth] friendly even to enemies.[3]