هَذَا خَاتَمُ حَدِيدٍ
Translation: This is a ring of iron.
هَذَا: demonstrative topic, nominative in position.
خَاتَمُ: nominative predicate and muḍāf; no tanwīn because of iḍāfa.
حَدِيدٍ: genitive muḍāf ilayh, marked with kasra.
The source excerpt is «خاتم حديد». The demonstrative hādhā is added here to provide a complete teaching sentence.
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At-Tamyīz: Clarifying Quantities and Sentence Relations
هَذَا خَاتَمُ حَدِيدٍ
Translation: This is a ring of iron.
هَذَا: demonstrative topic, nominative in position.
خَاتَمُ: nominative predicate and muḍāf; no tanwīn because of iḍāfa.
حَدِيدٍ: genitive muḍāf ilayh, marked with kasra.
The source excerpt is «خاتم حديد». The demonstrative hādhā is added here to provide a complete teaching sentence.