شَابَ قَرْنَاهَا.
Translation: Her two sidelocks turned grey.
شَابَ: past-tense verb, built on fatḥa.
It is originally a verb in a full verbal sentence. When the expression becomes an epithet or name, that internal verbal form is retained.
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Parsing the Verb Shāba
Diptote Causes — Compounding and Its Conditions
شَابَ قَرْنَاهَا.
Translation: Her two sidelocks turned grey.
شَابَ: past-tense verb, built on fatḥa.
It is originally a verb in a full verbal sentence. When the expression becomes an epithet or name, that internal verbal form is retained.