One analysis in the text treats kallā meaning ḥaqqan as an indeclinable noun because of its resemblance to the homonymous particle. This is a reported interpretation, not a universal rule.
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Noun Analysis of Kallā
The Particle Kallā: Rejection, Restraint and Emphasis
One analysis in the text treats kallā meaning ḥaqqan as an indeclinable noun because of its resemblance to the homonymous particle. This is a reported interpretation, not a universal rule.