It is doubtful whether this root meant originally to " cover " or " wipe out "; but probably it is used as a technical term without any consciousness of its etymology.
Here we recognize a technical term of the Avesta - namely, the "Frasho-kereti," that is the reanimation of the world or resurrection of the dead (Darmesteter, op. cit., p. 239).
In modern botany it is a technical term sometimes denoting the lower part of the capsule called pyxidium, attached to the flower stalk in the form of an urn.
As a technical term in theology, it has various shades of meaning according to the degree of authority which is postulated and the nature of the evidence on which it is based.