Muʿrab does not mean “a final vowel is always visibly different.”
Some declinable nouns have an estimated (non-visible) case ending, as in “مُوسَى”. Conversely, a mabnī noun may be in a different syntactic position without changing its fixed form.
Detailed visible and estimated endings come later.
| Word | Meaning |
|---|---|
| جَاءَ مُوسَىٰ | Mūsā came — muʿrab with estimated case |