The sixth point concerns which root-initial letters occur in Form VII. The textbook names ل، م، ن، ر and weak/soft letters, stating that heaviness favors Form VIII (iftiʿāl) in the relevant cases.
This is a claim about patterns of formation and usage rather than a semantic function such as intransitivity or mutāwaʿah. The source also records exceptions, so the rule must be read with its own qualifications.
LessonsCharacteristics of Form VII (Infiʿāl): Intransitivity, Manifestation, Resulting Action, Equivalence, Root Restrictions and Independent UseQuiz
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Sixth Topic: Restriction on Root-Initial Letters
The sixth point concerns which root-initial letters occur in Form VII. The textbook names ل، م، ن، ر and weak/soft letters, stating that heaviness favors Form VIII (iftiʿāl) in the relevant cases.
This is a claim about patterns of formation and usage rather than a semantic function such as intransitivity or mutāwaʿah. The source also records exceptions, so the rule must be read with its own qualifications.