שַׂקsak meaning in Biblical Hebrew
sackcloth; sack · noun, masculine
Also spelled in English: saq
Jacob wrapped himself in it for a son he thought was dead, and his sons carried that same son's grain home in it. One scratchy goat-hair cloth, and English still keeps it in every supermarket as 'sack'.
וַיִּקְרַע יַעֲקֹב שִׂמְלֹתָיו וַיָּשֶׂם שַׂק בְּמָתְנָיו וַיִּתְאַבֵּל עַל־בְּנוֹ יָמִים רַבִּים
“Jacob tore his clothes, put sackcloth on his loins, and mourned his son many days. (Genesis 37:34)”
Tie the rough goat-hair weave to two moments in Genesis: Jacob's waist in mourning, and Joseph's grain bags hiding silver.