Easton's Bible Dictionary (1897)
Mortar, a place in or near Jerusalem inhabited by silver merchants (Zeph. 1:11). It has been conjectured that it was the “Phoenician quarter” of the city, where the traders of that nation resided, after the Oriental custom.
Smith's Bible Dictionary (1863)
(a mortar or deep hollow), a place evidently in Jerusalem, the inhabitants of which are denounced by Zephaniah. (Zephaniah 1:11) Ewald conjectures that it was the Phoenician quarter” of the city.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
MAK'TESH (mortar), a place in Jerusalem denounced by Zephaniah. Zeph 1:11. Ewald conjectures that it was the "Phoenician quarter" of the city, and the Targum identifies it with the Kedron.