“لَ” (la)This prefix adds emphasis to the word or statement that follows.Corpus grammarEMPH — prefixed emph particle.
“ءَاكِلُونَ” (ʾākiluwna)means “Will surely eat” 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 — masculine plural nominative active noun.