“وَ” (wa)a joining word meaning “and.” It connects this word to what came before.Corpus grammarCONJ — prefixed conjunction wa (and).
“لِ” (li)means “for / to.” It is a preposition: it links this word to the next word or phrase.Corpus grammarP — prefixed preposition.
“رَبِّ” (rabbi)means “And for your Lord” in this verse. It is a noun. a naming word. Here it is masculine, genitive.Corpus grammarN — genitive noun.
“كَ” (ka)an attached pronoun meaning “you” when speaking to one man.Corpus grammarPRON — second person masculine singular attached pronoun.