From an unused root meaning to mingle (water with wine); tempered wine -- liquor.
Englishman's Concordance
1) mixture, mixed wine Part of Speech: noun masculine A Related Word by BDB/Strong’s Number: from an unused root meaning to mingle (water with wine) Same Word by TWOT Number: 1170a
Brown-Driver-Briggs
[מֶ֫זֶג] noun masculinemixture, i.e. mixed wine (Late Hebrew id., Aramaic, and thence מִזְנָא, מְזִיגָא; ; Arabic water mixed with wine, mixture (Fräl.c.), compare , ); — אַליֶֿחְסַר הַמָּ֑זֶג Cant 7:3 (Tosafoth here spiced wine: compare LevyNHWB iii. 61).
מזה (√ of following; probably compare Arabic suck out, compare DrDeuteronomy 32:24).