يَا رَجُلُ!
Translation: O man! (calling a particular person)
يَا: particle.
رَجُلُ: intended indefinite vocative, built on ḍamma in accusative position.
Though “rajul” is lexically common, the speaker addresses a specific man, so it follows the built-on-ḍamma rule.
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Al-Munādā: Vocative Types and Rules
يَا رَجُلُ!
Translation: O man! (calling a particular person)
يَا: particle.
رَجُلُ: intended indefinite vocative, built on ḍamma in accusative position.
Though “rajul” is lexically common, the speaker addresses a specific man, so it follows the built-on-ḍamma rule.