إِغْنَاءٌ — اِلْتِقَاءٌ
Translation: Making sufficient — meeting.
The textbook’s analysis connects the final hamzah in each maṣdar with transformations of a weak-final stem before the alif. Yet the derived prefixes differ: Form IV أَغْنَى and Form VIII اِلْتَقَى retain different pattern markers.
VerbImperfectMaṣdarImperative
أَغْنَىيُغْنِيإِغْنَاءٌأَغْنِ
اِلْتَقَىيَلْتَقِياِلْتِقَاءٌاِلْتَقِ
Do not derive the verbal noun merely from the spelling of the perfect. The form’s underlying derivational pattern determines its verbal noun formation.