PS

*šamn- - fat, oil (SED I No. 248)

Akkadian
šamnu - oil, fat (CAD Š₁ 321, AHw. 1157)
Ebla
sa-ma-nu ṭa-bù - Sum. Ì.DU₁₀ (VE 883; Krebernik 1983: 34)
Ugaritic
šmn, šmt - fat; vegetable oil (DUL 827–829)
Phoenician
šmn - oil (Tomback 1978: 323)
Hebrew
šämän - vegetable oil; fat (HALOT 1567–1569)
Official Aramaic
šmn - oil (DNWSI 1163)
Demotic Aramaic
šmn - to become fat (DNWSI 1265)
Palmyrean
šmn - oil (DNWSI 1163)
Jewish Palestinian Aramaic
šwmn - fat (DJPA 541)
Jewish Babylonian Aramaic
šumnā - fat, fatness (DJBA 1120)
Syriac
šumnā - fat (LSyr. 786, SL 1574)
Mandaic
šamina, šumna - fat (MD 443, 455)
Maalula
šomna - Butter (GNDM 91)
Arabic
samn- - (clarified) butter (Lane 1432)
Jibbali
šẽn - fat, fatness (JL 262)
The exact meaning remains to be ascertained. May be connected to PS *šamn-