مُوسَىٰ is a declinable noun, but it ends in an alif maqṣūra. An overt ḍamma, fatḥa, or kasra cannot be pronounced on that final alif.
The grammatical nominative, accusative, and genitive positions still exist. The relevant case ending is therefore said to be estimated rather than visible.
Crucial distinction
The absence of a visible vowel does not mean the noun has no governor. It is governed; the ending simply cannot display its case vowel.
| Word | Meaning |
|---|---|
| مُوسَىٰ | A proper noun ending in alif maqṣūra |