اكتب الرقم المرجعي والتفاصيل هنا.

اكتب means write.

It is the imperative (command) form of the verb كتب (to write), addressed to one masculine singular person.

So the sentence is giving an instruction:

• اكتب = write
• الرقم المرجعي = the reference number
• والتفاصيل = and the details
• هنا = here

In Arabic, the verb itself often tells you who the subject is, so you usually do not need a separate pronoun.

In اكتب, the meaning already includes you (singular masculine):

• اكتب = write!

So unlike English, Arabic does not need something like أنت here. Using أنت in a command would usually sound unnecessary.

Grammatically, اكتب is the command form for one male.

Related forms are:

• اكتبْ = write! (to one male)
• اكتبي = write! (to one female)
• اكتبوا = write! (to more than one person)

However, in instructions on forms, signs, or interfaces, Arabic sometimes uses the masculine singular as a general/default instruction. So even if the grammar is masculine singular, learners will often see it used in a broader practical sense.

Because Arabic usually puts the noun first and the adjective after it.

So:

• الرقم = the number
• المرجعي = reference / referential

Together:

• الرقم المرجعي = the reference number

This is the normal Arabic order:

• noun + adjective

In English, we usually do the opposite:

• adjective + noun

Because in Arabic, an adjective must agree with the noun in definiteness.

Here:

• الرقم = the number
• المرجعي = the reference-related / reference

Since the noun is definite, the adjective must also be definite.

Compare:

• رقم مرجعي = a reference number
• الرقم المرجعي = the reference number

So both words take الـ because the whole phrase is definite.

المرجعي comes from the root related to reference or referring back.

In this sentence, الرقم المرجعي is the standard way to say reference number.

Word-for-word, it is something like:

• the number
• the reference-related

But in natural English, that becomes the reference number.

التفاصيل means the details.

Its singular is تفصيل, but Arabic often uses the plural where English also naturally uses details.

So:

• تفصيل = detail
• التفاصيل = the details

In this sentence, the writer is asking for more than just the reference number; they also want the accompanying information or specifics.

The و simply means and.

So:

• الرقم المرجعي = the reference number
• والتفاصيل = and the details

Both of these are the things being written, so they are joined with و.

They are both direct objects of the command اكتب.

In other words, they answer the question write what?

• write the reference number
• write the details

So the structure is:

اكتب + object 1 + و + object 2 + هنا

هنا means here, and putting it at the end is very natural in Arabic.

So the sentence flows as:

• write the reference number and the details
• here

This is similar to English instructions like Write the reference number and details here.

Arabic word order is somewhat flexible, so you could also move هنا earlier for emphasis, but the version given is simple and natural.

Yes, to some extent.

For example, you could also say:

• اكتب هنا الرقم المرجعي والتفاصيل

This still means essentially the same thing: Write the reference number and details here.

The original version,

• اكتب الرقم المرجعي والتفاصيل هنا is probably the most neutral and natural for a form or instruction.

A simple pronunciation guide is:

uktub ar-raqam al-marjaʿī wa-t-tafāṣīl hunā

A few notes:

• اكتب = uktub
• الرقم sounds like ar-raqam because the l of الـ assimilates before ر
• والتفاصيل sounds like wa-t-tafāṣīl
• هنا = hunā

So you would say it roughly as:

uktub ar-raqam al-marjaʿī wa-t-tafāṣīl hunā

Yes. In fully vocalized formal Arabic, it would be something like:

اُكْتُبِ الرَّقْمَ الْمَرْجِعِيَّ وَالتَّفَاصِيلَ هُنَا

The important point for a learner is:

• the verb is an imperative
• الرقم and التفاصيل are direct objects, so they are in the accusative
• in normal everyday writing, these endings are usually not written

So most of the time, you will simply see:

اكتب الرقم المرجعي والتفاصيل هنا