Albert Barnes Commentary Isaiah 29:20

"For the terrible one is brought to nought, and the scoffer ceaseth, and all they that watch for iniquity are cut off;" — Isaiah 29:20 (ASV)

For the terrible one - The violent one (עריץ ‛ ârı̂yts), the oppressor, who had exercised cruelty over them. This, I suppose, refers to the haughty among the Jews themselves; to those who held offices of power, and who abused them to oppress the poor and needy.

And the scorner - (see Isaiah 28:14 and Isaiah 28:22).

Is consumed - Shall be entirely destroyed.

And all that watch for iniquity - That is, who anxiously seek for opportunities to commit iniquity.