What is "q-d-s"

Q-D-Š is a triconsonantal Semitic root meaning " sacred, holy", derived from a concept central to ancient Semitic religion. From a basic verbal meaning "to consecrate, to purify", it could be used as an adjective meaning "holy", or as a substantive referring to a "sanctuary, sacred object, sacred personnel."

The root is reflected as qdš ( Hebrew קדש) in Northwest Semitic and as qds ( Arabic ) in Central and South Semitic. In Akkadian texts, the verb conjugated from this root meant to "clean, purify."