The source asks for the meanings of مِسْمَعٌ، مَنَاصِرُ، مَفَاتِيحُ.
Word / formMeaning / explanation
مِسْمَعٌan instrument of hearing; it can also be used for an ear. It follows mifʿal.
مَنَاصِرُa morphological broken plural for instruments associated with helping, on mafāʿil. It should not be confused with the regular active-participle noun نَاصِرٌ, “helper.”
مَفَاتِيحُkeys, the broken plural of miftāḥ on mafāʿīl.
Each answer connects lexical sense with the relevant root and pattern.