Taxis conveys the idea of an established arrangement or appointed order. In classical Greek it ranged from military formations to civic ranks, but the New Testament narrows its usage to two main spheres: liturgical priestly order and congregational propriety. Zechariah serves according to the taxis of his priestly division (Luke 1:8), Paul insists that everything in worship be done decently and in taxis (1 Cor 14:40), and Hebrews repeatedly identifies Christ as a priest 'according to the order of Melchizedek' (Heb 5:6, 10; 6:20; 7:11, 17). The Spanish orden, French ordre, and German Ordnung all preserve this dual sense of rank and proper arrangement.