From an unused root (probably meaning to weigh out); an ingot (as definitely estimated and stamped for a coin) -- piece of money (silver).
H7192. qesitah
קְשִׂיטָה noun feminine unit of (unknown) value, perhaps weight: Genesis 33:19 "" Joshua 24:32 (both E), Job 42:11.
קשׂשׂ (√ of following; Late Hebrew קַשְׂקֶשֶׂת scale; 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).