﴿ حِكْمَةٌۢ بَٰلِغَةٌۭ ۖ فَمَا تُغْنِ ٱلنُّذُرُ ﴾

“far-reaching wisdom [was held out to them]: but [since] all warnings have been of no avail,”

wisdom hikmatun is the predicate of an omitted subject or a substitution for mā ‘such as’ or for muzdajar ‘deterrent’ that is far-reaching complete; but warnings nudhur is the plural of nadhīr functioning in the agent sense of mundhir ‘a warner’ that is to say ‘those matters which warn them’; mā is either for negation or it is an interrogative of denial in which case it stands as a preceding direct object are of no avail warnings are of no use with them.