From shaqah; a beverage; moisture, i.e. (figuratively) refreshment -- drink, marrow.
see HEBREW shaqah
H8250. shiqquy
שִׁקּוּי noun [masculine] drink (Ba§ 102 d); — ׳שׁ לְעַצְמוֺתֶיךָ Proverbs 3:8 drink (figurative for refreshment) to thy bones (compare verb Pu`al); plural suffix שִׁקֻּוַי (Ol§ 186 b) Psalm 102:10 (+לֶחֶם va) שִׁקּוּיָ֑י Hosea 2:7.