From garaph (in the sense of grasping); the clenched hand -- fist.
see HEBREW garaph
H106. egroph
[אֶגְרֹף] noun [masculine] fist (ᵐ5 πυγμή, so ᵑ9; but ᵑ7 club, staff (?), & so SS, compare especially Exodus 21:18; — Late Hebrew אֶגְרוֺף) — בְאֶגְרֹ֑ף אוֺ בְּאֶבֶן אֶתרֵֿעֵהוּ אִישׁ וִהִכָּה 21:18; (construct) רֶ֑שַׁע בְּאֶגְרֹף לְהַכּוֺת Isaiah 58:4.