Ρ.
From LSJ
μηδενί δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement on anything until you have heard a speech on both sides
English (Autenrieth)
Many words beginning with ρ originally began with two consonants, esp. ϝρ or σρ (ϝρήγνῦμι, σρέω), and the quantitative (metrical) effect of the two letters has been preserved in the frequent doubling of ρ (ἔρρεον). What the initial consonant was cannot always be determined.
