وَشَرْطُهُ أَنْ يَكُونَ وَصْفًا فِي أَصْلِ الْوَضْعِ
Translation: It is a condition that the word be adjectival in its original lexical assignment.
A word's ability to describe something today does not automatically make it a diptote. The technical conditions for an effective adjectival cause must hold.
The book contrasts inherently adjectival «أَسْوَد» with its later example «أَرْبَع» to explain this nuance.
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Causes of Diptote Status — ʿAdl and Waṣf
وَشَرْطُهُ أَنْ يَكُونَ وَصْفًا فِي أَصْلِ الْوَضْعِ
Translation: It is a condition that the word be adjectival in its original lexical assignment.
A word's ability to describe something today does not automatically make it a diptote. The technical conditions for an effective adjectival cause must hold.
The book contrasts inherently adjectival «أَسْوَد» with its later example «أَرْبَع» to explain this nuance.