From an unused root meaning to hold; possession -- + steward.
H4943. mesheq
מֶ֫שֶׁק noun [masculine] acquisition, possession (?; meaning conjectured from context, from analogy of מִמְשָׁק q. v., and of משׁך), only אֱלִיעֶזֶר דַּמֶּשֶׂק הוּא בֵּיתִי וּבֶןמֶֿשֶׁק Genesis 15:2 (compare בן
8 (λ), above; Ges§ 128. 2, R. 2. c) and the son of acquisition (= he who is to acquire, the heir of) my house is, etc.; ׳מ possibly changed from משׁך (compare Job 28:18) for word-play with דמשׂק, Kau and SoGn. Anm. 62, or by copyist's error, but very dubious. ᵐ5 Μασεκ (proper name, compare LagBN 78).