The relevant standard is the linguistic understanding of the earliest Arab audience. Qur’anic discourse was addressed through recognizable forms of speech, not the contrived verbal puzzles that a much later reader might invent.
Many remote theoretical possibilities could be proposed for an ordinary statement. They do not become persuasive interpretations without support from actual usage and context. Even a word with more than one dictionary entry may have only one plausible sense in a particular utterance.
This approach is not opposed to careful linguistic study. It disciplines it: grammatical possibilities must be weighed against recognized Arabic expression and the surrounding discourse. Interpretation should not substitute ingenuity in producing doubts for evidence of what the words communicate.