The Hebrew word of the week is kadash ("to sanctify"), taken from the weekly Torah portion called Kedoshim. Derivatives of this word appear in the second verse of the Torah portion (i.e, Leviticus 19:2):
You shall be holy, for I, the LORD your God, am holy.
Kadash is a root word(Strong# 6942; TWOT # 1990) that means to set apart, to distinguish, to sanctify, or to hallow. Kadash connotes that which belongs to the sphere of the sacred, and thus is distinguished from the common or profane. Other words that use this root include:
For you are a people holy to the LORD your God, and the LORD has chosen you to be a people for his treasured possession (am segulah), out of all the peoples who are on the face of the earth. (Deut 14:2)
There is none holy as the LORD: for there is none beside thee: neither is there any rock like our God. (1 Samuel 2:2)
But thou art holy, O thou that inhabitest the praises of Israel. (Psalm 22:4)
And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory (Isa. 6:3)