“وَ” (wa)a joining word meaning “and.” It connects this word to what came before.Corpus grammarCONJ — prefixed conjunction wa (and).
“مِزَاجُ” (mizāju)means “And its mixture” in this verse. It is a noun. a naming word. Here it is masculine, nominative.Corpus grammarN — nominative noun.
“هُ” (hu,)an attached pronoun meaning “he” or “him.”Corpus grammarPRON — third person masculine singular attached pronoun.