From an unused root (probably meaning to weigh out); an ingot (as definitely estimated and stamped for a coin) -- piece of money (silver).
Englishman's Concordance
1) a unit of unknown value 1a) perhaps weight, money Part of Speech: noun feminine A Related Word by BDB/Strong’s Number: from an unused root (probably meaning to weigh out) Same Word by TWOT Number: 2081a
קשׂשׂ (√ of following; Late Hebrew קַשְׂקֶשֶׂתscale; compare Arabic skim off fat, IV. scale off (Berggren), be healed form small-pox, etc. (Muƒi‰; i.e. scale off), compare get well from leanness, Frey (†am Golius); also sweep (up débris) Dozyii. 347).
Genesis 33:19 HEB:שְׁכֶ֑ם בְּמֵאָ֖ה קְשִׂיטָֽה׃ NAS: for one hundred pieces of money. KJV: for an hundred pieces of money. INT: Shechem's hundred pieces
Joshua 24:32 HEB:שְׁכֶ֖ם בְּמֵאָ֣ה קְשִׂיטָ֑ה וַיִּֽהְי֥וּ לִבְנֵֽי־ NAS: for one hundred pieces of money; and they became KJV: for an hundred pieces of silver: and it became the inheritance INT: of Shechem hundred pieces became sons
Job 42:11 HEB:ל֗וֹ אִ֚ישׁ קְשִׂיטָ֣ה אֶחָ֔ת וְאִ֕ישׁ NAS: him one piece of money, and each KJV: him a piece of money, and every one INT: gave and each piece one one