Kelipot

The Qliphoth/Qlippoth/Qlifot or Kelipot (Hebrew: קְלִיפּוֹת‎, the different English spellings are used in the alternative Kabbalistic traditions of Hermetic Qabalah and Jewish Kabbalah respectively), literally "Peels", "Shells" or "Husks" (from singular: קְלִיפָה‎ qlifah "Husk"), are the representation of evil or impure spiritual forces in Jewish mysticism, the polar opposites of the holy Sefirot. The realm of evil is also termed Sitra Achra/Aḥra (Aramaic סטרא אחרא‎, the "Other Side" opposite holiness) in Kabbalah texts.

In Jewish Kabbalistic cosmology, the Qliphoth are metaphorical "shells" surrounding holiness. They are spiritual obstacles receiving their existence from God only in an external, rather than internal manner. Divinity in Judaism connotes revelation of God's true unity, while the shells conceal holiness, as a peel conceals the fruit within. They are therefore synonymous with idolatry, the root of impurity through ascribing false dualism in the Divine, and with the Sitra Achra (סטרא אחרא "Other Side"), the perceived realm opposite to holiness. They emerge in the descending Seder hishtalshelus (Chain of Being) through Tzimtzum (contraction of the Divine Ohr), as part of the purpose of Creation. In this they also have beneficial properties, as peel protects the fruit, restraining the Divine flow from being dissipated. Kabbalah distinguishes between two realms in Kelipot, the completely impure and the intermediate.

...
Wikipedia