Qaṭaʿa is transitive with al-ḥabla as object; inqaṭaʿa is intransitive with al-ḥablu as subject. This demonstrates a change of verb pattern and valency.
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A Transitive Verb Can Become Intransitive
Intransitive and Transitive Verbs: One, Two, Three Objects
Qaṭaʿa is transitive with al-ḥabla as object; inqaṭaʿa is intransitive with al-ḥablu as subject. This demonstrates a change of verb pattern and valency.