“فَ” (fa)This word introduces a reason or result, like “so that.”Corpus grammarCAUS — prefixed caus particle.
“بَشِّرْ” (bashbir)means “so give them tidings” in this verse. It is a verb. an action or state word. Here it is verb pattern two, second person — masculine — singular.Corpus grammarV — second person masculine singular imperative verb.
“هُم” (hum)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural attached pronoun.