παραβαλλέταιρος
From LSJ
ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην, πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → hard it is to learn the mind of any mortal or the heart, 'till he be tried in chief authority | it is impossible to know fully any man's character, will, or judgment, until he has been proved by the test of rule and law-giving
English (LSJ)
ὁ, (A παραβάλλω A. VI) one who betrays his comrade, Eust.1406.24.
Greek Monolingual
ὁ, Μ
1. αυτός που εκθέτει τον σύντροφό του σε κίνδυνο
2. (κατ' επέκτ.) αυτός που προδίδει τον σύντροφο του.
[ΕΤΥΜΟΛ. < παραβάλλω + ἑταῖρος «σύντροφος»].