“اصْلَ” (aṣla)means “Burn therein” in this verse. It is a verb. an action or state word. Here it is second person — masculine — plural.Corpus grammarV — second person masculine plural imperative verb.
“وْ” (w)an attached pronoun meaning “you all.” It shows who is being addressed.Corpus grammarPRON — second person masculine plural subject pronoun.
“هَا” (hā)an attached pronoun meaning “she” or “her.”Corpus grammarPRON — third person feminine singular attached pronoun.