“وَ” (wa)a joining word meaning “and.” It connects this word to what came before.Corpus grammarCONJ — prefixed conjunction wa (and).
“يُنذِرَ” (yundhira)means “And to warn” in this verse. It is a verb. an action or state word. Here it is imperfect verb, verb pattern four, third person — masculine — singular, a dependent form.Corpus grammarV — third person masculine singular subjunctive imperfect verb.