اِنْقَاضَ is presented as a hollow-yāʾ Form-VII verb, with the sense of a wall cracking or splitting. Its root is ق ي ض.
CategoryForm
Perfectاِنْقَاضَ
Imperfectيَنْقَاضُ
Verbal nounاِنْقِيَاضٌ
Active participleمُنْقَاضٌ
Imperativeاِنْقَضْ
Prohibitionلَا تَنْقَضْ
The contracted command اِنْقَضْ shows that a hollow long vowel is not retained mechanically in every grammatical environment. This example is treated intransitively here; unattested passive derivatives are not forced into the short paradigm.