“فَ” (fa)This word resumes the flow after a pause or change in thought.Corpus grammarREM — prefixed rem particle.
“لْ” (l)This prefix turns the following verb into an instruction or command.Corpus grammarIMPV — prefixed impv particle.
“يَضْحَكُ” (yaḍḥaku)means “So let them laugh” in this verse. It is a verb. an action or state word. Here it is imperfect verb, third person — masculine — plural, a command-related form.Corpus grammarV — third person masculine plural jussive imperfect verb.
“وا” (wā)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural subject pronoun.