3. weird, eerie, unearthly, uncanny refer to that which is mysterious and apparently outside natural law. Weird can refer to that which is suggestive of the fateful intervention of supernatural influences in human affairs: the weird adventures of a group lost in the jungle. Eerie refers to that which, by suggesting the ghostly, makes one's flesh creep: an eerie moaning from a deserted house. Unearthly refers to that which seems by its nature to belong to another world: an unearthly light that preceded the storm. Uncanny refers to that which is mysterious because of its apparent defiance of the laws established by experience: an uncanny ability to recall numbers. 1, 3. See bizarre.

Did you mean witness?