“Spirit of knowledge and the fear of the Lord” is one of the three names given to the Holy Spirit that are mentioned in a verse of Isaiah. Isaiah prophesied that the messianic shoot or branch would be anointed with the Spirit of the Lord. Each of the names for the Spirit mentioned in the verse is a doublet that highlights different characteristics of Jesus.
The Hebrew word weyir’ath is related to the word yare’, which means fear. Not necessarily terror but reverence.
Spirit of knowledge and the fear of the Lord in Hebrew:
Ruakh da‘at weyir’at Yahweh
Strong’s Concordance numbers: 7307, 1847, 3374, 3068
Bible reference: Isa. 11:2
The Spirit of the Lord will rest on Him,
The spirit of wisdom and understanding,
The spirit of counsel and strength,
The spirit of knowledge and the fear of the Lord. (Isaiah 11:2)
Similar names for God are God of knowledge and One perfect in knowledge.