“يَأْتُ” (yaʾatu)means “They (will) bring to you” in this verse. It is a verb. an action or state word. Here it is imperfect verb, third person — masculine — plural, a dependent form.Corpus grammarV — third person masculine plural subjunctive imperfect verb.
“و” (w)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural subject pronoun.
“كَ” (ka)an attached pronoun meaning “you” when speaking to one man.Corpus grammarPRON — second person masculine singular attached pronoun.