How does the verbal noun often come as a *hāl* (circumstantial phrase) when it is originally a description?

The student: How does *kathīran* (often) come when the verbal noun is a *hāl* (circumstantial phrase) and a description?

The Shaykh : Yes, this is a verbal noun with the meaning of a description.
The student: So it is the description?

The Shaykh : It is itself a verbal noun with the meaning of a description, but one may describe using the verbal noun for the sake of exaggeration, as if it is the verbal noun itself rather than the one possessing the quality of the verbal noun. So if you say, “‘Adl Rada” (Justice is Rada), if you say “Zayd Rada” (Zayd is Rada), it is more emphatic than saying “Zayd Dhu Rada” (Zayd is one of Rada) or “Zayd Rāḍin” (Zayd is pleased), as if you made it itself...
The student: And the original is *Rāḍin* (pleased).

The Shaykh : The original is known; the original is the active participle, or it is brought with the meaning of “possessor” and made possessive with the verbal noun, so it is said: *Dhu Rada* (one of Rada), *Dhu ‘Adl* (one of Justice), *Dhu Baghtah* (one of suddenness), and the like.
The student: What is the original of this example?

The Shaykh : Yes? No, from the author, from the author.