The Qur’an was revealed in an Arabic idiom familiar to its earliest audience. Everyday speech, idioms, poetic conventions, and established rhetorical usage gave those hearers access to many expressions that may be less familiar to later readers.
Linguistic clarity does not mean that every listener automatically understood every religious truth or that each word has only one possible sense. It means that the discourse operates within an intelligible, disciplined linguistic tradition.
A later interpreter must recover that usage rather than assume that a modern, isolated dictionary gloss settles every passage.