“فَ” (fa)This word resumes the flow after a pause or change in thought.Corpus grammarREM — prefixed rem particle.
“يُعَذِّبُ” (yuʿadhʿibu)means “Then will punish him” in this verse. It is a verb. an action or state word. Here it is imperfect verb, verb pattern two, third person — masculine — singular.Corpus grammarV — third person masculine singular imperfect verb.
“هُ” (hu)an attached pronoun meaning “he” or “him.”Corpus grammarPRON — third person masculine singular subject pronoun.