The الاسم المعرب divides into two categories. They are either منصرف or غير منصرف.
The first منصرف is when the ending is fully shown.
The second غير منصرف is when the hidden is not apparent.

There can be several reasons for their predicament. However there needs to be a combination of 2 from 9 possibilities; or one that is so powerful that it stands in the place of two.
- العدل – Transformation
- The word has changed from its original form.
- It does not join with وزن الفعل
- It will join with العلمية like عمر and زفر
- It will join with الوصف like ثلاث و مثلث وأخر وجمع
- الوصف – Attribute
- It will never join with العلمية
- It is conditioned that the word a attribute in its original coinage like أسود و أرقم
- In the example مررت بنسوة اربع the اربع is not qayr munsarif because it is not originally a وصف
- التأنيث – Feminine
- If it has a tamarbutah at the end, it must also be a name, like طلحة
- Likewise if it is understood feminine, like زينب
- If the understood feminine, if it is three lateral, and has a sukun in the middle, it can be declined or not
- If it is feminine by alif maqsura or mamduda, like حبلى and حمراء , is not possible to do decline in any situation
- المعرفة – Definite
- Will need to be a proper noun as well and will combine with an attribute
- العجمة – Foreign
- It is necessary to be a proper noun in the foreign language
- More than 3 letters like ابراهيم and اسماعيل
- If it is 3 letters, the middle letter, must be not have a sukun like لخام
- نوح is declined because the middle has a sukun
- الجمع – Plural
- It must be on the form of the ultimate plural like مساجد and داوب
- التركيب – Combination
- It must a proper noun without annexation like بعلبك and معد بكرب
- الألف والنون الزائدتان
- If it is a pronoun like عمران, عثمان, and سعدان
- If it is a attribute, it must not be a feminine on the pattern of فعلانة like, سكران and عطشان
- وزن الفعل – Pattern of a Verb