The second example is قَلْنَسَ.
Its base root is triliteral: ق، ل، س.
A silent نْ is inserted between the second and third root letters.
Its Masdar is قَلْنَسَةٌ, meaning to wear or put on a cap.
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Bab 2: Qalnasa
Attached Trilateral (Mujarrad) - Bab 1: Fa'lalah & Bab 2: Fa'nalah
The second example is قَلْنَسَ.
Its base root is triliteral: ق، ل، س.
A silent نْ is inserted between the second and third root letters.
Its Masdar is قَلْنَسَةٌ, meaning to wear or put on a cap.