spiritus, spiritus (m)
spirit Nouns: The Divine
4th declension. Spiritus Sanctus (Holy Spirit). Same form in nominative and genitive singular
In Scripture
Quod natum est ex carne, caro est : et quod natum est ex spiritu, spiritus est.
That which is born of the flesh is flesh: and that which is born of the Spirit is spirit.
John 3 · 6