An element in the name Abattârik, whose Quenya equivalent Ardamin seems to mean “World Tower” (UT/222). Since the last element of this name is târik* “pillar”, it is possible that the first element means “world”. This first element could be *abat, but it could also be *aban with the last n becoming t according to the Adûnaic rules for assimilation, as suggested before by several authors (AAD/9, EotAL/BAN¹). Andreas Moehn further suggested (LGtAG) it may have replaced earlier dâira “Earth”, though the two words could also co-exist with slightly different meanings.
* abannoun. ?world