“وَ” (wa)a joining word meaning “and.” It connects this word to what came before.Corpus grammarCONJ — prefixed conjunction wa (and).
“يَسِّرْ” (yassir)means “And ease” 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.