מִלּוֹא millôwʼ (H4407)

a rampart (as filled in), i.e. the citadel

Millo = "rampart" or "mound" 1) a place near Shechem; site unknown 2) a part of the fortifications of Jerusalem

or מִלֹּא; (2 Kings 12:20), from מָלֵא (H4390);