What is…
Metheg-ammah

also known as: metheg haammah

Hebrew: הָאַמָּ֖ה

Meaning: bridle of the mother

This is a figurative name for a chief city, as in 2 Samuel 8:1, “David took Metheg-ammah out of the hand of the Philistines.”

Revised King James Version: “took the bridle of the mother-city”); i.e., subdued their capital or strongest city, viz., Gath (1 Chronicles 18:1).