pseustēs

The lexica treat ψεύστης as the agent noun of ψεύδομαι, an -της formation denoting the person characterized by the action; LSJ documents the classical usage from Homer onward. BDAG gives a single sense, "liar", and separately flags the idiom ψεύστην ποιεῖν τινα, to make someone a liar, at 1 Jn 1:10 and 5:10, where the object is God and the charge arises from rejecting his μαρτυρία. Bultmann's TDNT treatment of the ψεύδομαι group reads the Johannine occurrences within the ἀλήθεια/ψεῦδος antithesis, in which ψεύστης designates not the occasional teller of untruths but the person who stands outside the sphere of truth; Schnackenburg and Brown apply this to the test formulas of 1 Jn 2:4 and 4:20, where the predicate follows from the contradiction between confession and conduct. On 1 Jn 2:22 the articular ὁ ψεύστης is widely taken as identifying the denier of Jesus' messiahship with the archetypal falsehood of the antichrist rather than as a generic label; Brown and Yarbrough set out the case. On Jn 8:44 commentators divide over ὁ πατὴρ αὐτοῦ, whether αὐτοῦ is neuter and the devil is the father of the lie, the majority reading defended by Barrett, or masculine, yielding a father of the liar; the ψεύστης predicate is unaffected either way. On Rom 3:4, where Paul cites Ps 115:2 LXX, Cranfield and Dunn read ἀληθής of God's covenant faithfulness and correspondingly take πᾶς ἄνθρωπος ψεύστης of human unreliability rather than of habitual mendacity. Marshall notes that Tit 1:12 quotes a hexameter attributed to Epimenides and that the Cretan reputation for falsehood was proverbial enough to generate the verb κρητίζειν.