TgJ Is1:25 :וַאְבָרֵיר כְמָא דִמנַקַן בְבוֹרִיתָא‏ : I shall purify as they clean with alkali
See the entire entry for bwry n.f. alkali

TgJ Is1:25 :וַאְבָרֵיר כְמָא דִמנַקַן בְבוֹרִיתָא כָל רַשִיעַך‏ : I shall cleanse all your evil as they clean with alkali
See the entire entry for brr vb. to select; clarify

TgJ Is1:25 :וַאְבָרֵיר כְמָא דִמנַקַן בְבוֹרִיתָא‏ : I will clean the way one cleanses with alkali
See the entire entry for nqy vb. D to cleanse