THE COMPLETION OF THE AGE — syn ('together') + teleia (from telos, an end or goal): a bringing-to-completion, not a mere stopping. ⚠ It is Matthew's own phrase: he uses it five times (13:39, 40, 49; 24:3; 28:20) and no other evangelist has it at all. AIŌN is an age or era rather than 'the world' — which is why KJV's 'the end of the world' at 24:3 imports a cosmology the Greek does not state, and why ASV/NIV/NWT read 'age.' Note where the phrase last appears: the very final sentence of the Gospel, 'I am with you all the days until the synteleia of the age' (28:20), which makes the completion something Matthew ends on rather than fears. → first discussed at Matt 24:3