עֹפֶלʻÔphel

mound, hill, only as acropolis, fortified mound or hill within city (2 Kings 5:24; Micah 4:8; Isaiah 32:14; Nehemiah 3:26; Nehemiah 11:21)

Pronunciation: o'-fel · Hebrew/Aramaic (Old Testament) · H6077

Same root

עֹפֶלʻôphel · H6076a tumor; also a mound, i.e. fortress

Where it appears

Appears 5 times in the Bible.

2 Chronicles 27:3 Jotham rebuilt the upper gate of the Temple of the Lord. He also did extensive rebuilding on the wall at the hill of Ophel.
2 Chronicles 33:14 After this Manasseh rebuilt the outer wall of the City of David, from west of the Gihon Spring in the Kidron Valley to the Fish Gate, and continuing around the hill of Ophel. He built the wall very high. And he stationed his military officers in all of the fortified towns of Judah.
Nehemiah 3:26 with the Temple servants living on the hill of Ophel, who repaired the wall as far as a point across from the Water Gate to the east and the projecting tower.
Nehemiah 3:27 Then came the people of Tekoa, who repaired another section across from the great projecting tower and over to the wall of Ophel.
Nehemiah 11:21 The Temple servants, however, whose leaders were Ziha and Gishpa, all lived on the hill of Ophel.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).