The Lord God. Hebrew Adonai Jehovah (App-4). This title is used because of His connection here with the earth.
strong. mighty strength (to hold fast). Hebrew. hazak.
Related Commentaries of Isaiah 40:10
Isaiah 40:10
10 Behold, the Lord GOD will come with strongd hand, and his arm shall rule for him: behold, his reward is with him, and his work before him.