“وَ” (wa)means “and.” It is a preposition: it links this word to the next word or phrase.Corpus grammarP — prefixed preposition.
“ال” (al)the Arabic equivalent of “the.” It makes the following noun specific.Corpus grammarDET — prefixed definite article.
“صَّٰفَّٰتِ” (ṣṣāffāti)means “By those lined” in this verse. It is a noun form. a word describing a doer or an action in progress. Its opening “mu-” is part of this word pattern, not a separate added word.Corpus grammarN — feminine plural genitive active noun.