alētheia

Standard post-Barr lexicography treats this word as genuinely many-sided rather than as a single concept. BDAG distinguishes truthfulness and dependability, the content of what is true set against lies, and actual reality or fact (citing Mark 5:33; 2 Corinthians 7:14). Louw and Nida place it in two distinct semantic domains, one for real versus unreal and one for true versus false, a structural admission of its range. James Barr's Semantics of Biblical Language dismantled the older grand contrast between a Greek truth of correspondence and a Hebrew truth of faithfulness, exposing the root fallacy and the confusion of a word with a whole concept; the post-Barr handbooks (Silva's NIDNTTE; Hübner in EDNT; Thiselton in NIDNTT) absorb this and read the word contextually. The Greek Old Testament is the recognized bridge: its regular rendering of the Hebrew words for firmness and faithfulness made the relational sense salient for Jewish and Christian Greek. Classical philology (Friedländer, Krischer, Cole) shows that even Homer used the word for the whole story of an accurate report, not for Heidegger's unconcealment, a reading Heidegger himself abandoned in 1964. On the Johannine usage de la Potterie's two-volume study, Brown's Anchor Bible commentary, and Lincoln's forensic reading of the Fourth Gospel as a lawsuit anchor the modern discussion; for the Pastorals' near-credal knowledge of the truth, Marshall and Towner reframe the older early-catholic verdict as missional consolidation.