The Greek word hagios

Related to the Greek verb “hagiazo” (sanctify, purify) and the Greek noun “hagiasmos” (sanctification), the Greek word  “hagios” is an adjective.  This word means “holy” when applied to things and “consecrated” when applied to people.

This is a common New Testament word and in several places such as Mk. 12:36; 13:11Mk. 12:36; 13:11
English: American Standard Version (1901) - ASV

36 David himself said in the Holy Spirit, The Lord said unto my Lord, Sit thou on my right hand, Till I make thine enemies the footstool of thy feet. 11 And when they lead you to judgment, and deliver you up, be not anxious beforehand what ye shall speak: but whatsoever shall be given you in that hour, that speak ye; for it is not ye that speak, but the Holy Spirit.

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it describes the “Holy” Spirit.  This term is found in every New Testament book but Galatians, James, Second and Third John.