From an unused root of uncertain meaning; apparently juice, i.e. (figuratively) vigor; also a sweet or fat cake -- fresh, moisture.
H3955. lashad
[לָשָׁד] noun masculine juice, juicy or dainty bit, dainty; — construct הַשָּׁ֑מֶן לְשַׁד כְּטַעַן Numbers 11:8 (J) simile of taste of manna (ᵐ5 ἐγκρίς, ᵑ9 panis oleatus), i.e. a dainty prepared with oil (compare Di); נֶהְמַּךְ קַיִץ בְּחַרְבֹנֵי לְשַׁדִּי Psalm 32:4 my juice (sap, life-moisture) is transformed, etc.
לשׁך (√ of foll; meaning unknown).