Ruach HaKodesh reads in the construct as "the breath, the set-apart" — the holy ruach, the consecrated breath. The Hebrew binds two nouns: ruach, the moving breath, and kodesh, separateness or set-apartness. Together they name the ruach that is not common, not ambient, but set apart for covenant purpose. The same word that hovered at creation. The same word that rested on the prophets. The same word that, after Shavuot, indwells the covenant community.

The English "Holy Spirit" lands on Western ears as the third member of a Trinity formula. That is a downstream theological category, not a Hebrew word. The Hebrew is not making a theological argument. It is naming the breath of YHWH in its set-apart movement. When David in Psalm 51:11 prays "do not take Your ruach hakodesh from me," he is not reaching for Trinitarian Christology. He is naming the consecrated breath that empowered him as king. When Isaiah 63:10 says Israel grieved His ruach hakodesh, the picture is a wind that recoils because the people have set themselves against the One who breathed it.

Read forward into the Brit Chadashah and the same ruach hakodesh fills the upper room at Shavuot, settles on the believers as tongues of fire, animates Yeshua's ministry, and becomes the indwelling breath of the covenant community. Same breath. Same ruach. Now indwelling. The Qumran scrolls anticipated this without seeing it: ruach hakodesh dwells in the covenant community. They did not yet know that through Yeshua the dwelling would be permanent.