From chatsats; properly, something cutting; hence, gravel (as grit); also (like chets) an arrow -- arrow, gravel (stone).
see HEBREW chatsats
see HEBREW chets
H2687. chatsats
חָצָץ noun [masculine] gravel (as divided, comminuted; Aramaic חֲצִיצָא, ) — only absolute ׳ח Proverbs 20:17; Lamentations 3:16 [חֲצָצֶיךָ Psalm 77:18 see חֵץ]. — ח ׳יְמַלֵּאפִֿיהוּ Proverbs 20:17 figurative of a liar; בח ׳וַיַּגְרֵס שִׁנָּ֑י Lamentations 3:16 and he hath crushed my teeth with gravel-stones, figurative of ׳י's dealings with sufferer.