Klein Dictionary, זקק ᴵ 1

זקק ᴵ to refine, purify.
    — Qal - זָקַק was purified, refined.
    — Pi. - זִקֵּק he purified, refined.
    — Pu. - זֻקַּק was purified, was refined.
    — Nith. - נִזֽדַּקֵּק was purified, was refined. [Prob. denominated from Aram. זִקָּא, Syr. זֶקָּא (= leather bottle, wineskin), Arab. ziqq (= skin of water, milk, wine, etc.), Ethiop. zeqq, of s.m. (see זִיק ᴵᴵ). The bases זגג and זכך are prob. related.] Derivatives: זִקּוּק ᴵ, זַקָּק ᴵ, מֽזֻקָּק ᴵ, מַזֽקֵקָה, תַּזֽקִיק.