جَاءَ غُلَامُ زَيْدٍ
Ghulāmu has no tanwīn because it is the mudāf.
Zaydin retains kasratayn as a fully declinable mudāf ilayh.
Do not remove tanwīn from both nouns automatically. The mudāf specifically loses tanwīn; the complement follows its normal declension rules.
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Al-Majrūrāt — Semantic and Formal Iḍāfah
جَاءَ غُلَامُ زَيْدٍ
Ghulāmu has no tanwīn because it is the mudāf.
Zaydin retains kasratayn as a fully declinable mudāf ilayh.
Do not remove tanwīn from both nouns automatically. The mudāf specifically loses tanwīn; the complement follows its normal declension rules.