'Fearful' in the Bible

Who is like unto thee, O LORD, among the gods? who is like thee, glorious in holiness, fearful in praises, doing wonders?

And He saith, 'Lo, I am making a covenant: before all thy people I do wonders, which have not been done in all the earth, or in any nation, and all the people in whose midst thou art have seen the work of Jehovah, for it is fearful that which I am doing with thee.