Behold, thou art wiser than Daniel; there is no secret that they can hide from thee:
Behold, thou art wiser than Daniel. Ezekiel ironically alludes to Ithbaal's overweening opinion of the wisdom of himself and the Tyrians, as though superior to that of Daniel, whose fame had reached even Tyre as eclipsing the Chaldean sages (Daniel 2:46-48). "Thou art wiser," namely, in thy own opinion (Zechariah 9:2).
There is no secret that they can hide from thee - "no secret," namely, for getting riches (Ezekiel 28:4).
That they can hide - i:e., that can be hidden.