حط الرسالة بمغلف قبل ما تروح عالبريد.

حط means put or place. In this sentence, it is the imperative form, so it is giving a command: Put the letter...

It is colloquial Levantine Arabic, not Modern Standard Arabic. In MSA, you would more likely see ضَع or a different phrasing, but in everyday Levantine speech, حط is extremely common.

It is addressed to one male. Other common forms are:

• حط = put! (to one male)
• حطي = put! (to one female)
• حطّوا = put! (to a group)

It is usually pronounced roughly like ḥoṭṭ or ḥuṭṭ, depending on the local accent.

A few things matter here:

• ح is a strong, breathy h sound made deeper in the throat than English h
• The ط is an emphatic t
• The word has a doubled final consonant, so the ṭ is held a little longer

So it does not sound like plain English hot.

الرسالة means the letter, while رسالة means a letter.

So:

• حط الرسالة = put the letter
• حط رسالة = put a letter

Arabic often uses the definite article الـ when the item is already known from context, just like English uses the.

Yes, بـ can have several meanings depending on context, including with, in, inside, or sometimes by means of.

Here, بمغلف means something like in an envelope.

So:

• مغلف = envelope
• بمغلف = in an envelope / inside an envelope

In everyday Levantine, using بـ this way is very natural. A learner might expect في مغلف, and that can also make sense in some contexts, but حط الرسالة بمغلف is a normal colloquial way to say put the letter in an envelope.

Because بمغلف usually means in an envelope, not necessarily in the envelope.

Compare:

• بمغلف = in an envelope
• بالمغلف = in the envelope

So if the envelope has not been specified before, بمغلف is the natural choice.

قبل ما means before followed by an action, so here it means before you go.

This is a very common Levantine structure:

• قبل ما تروح = before you go
• بعد ما توصل = after you arrive
• لما يجي = when he comes

The word ما here is part of the expression and does not mean not.

تروح is the present/imperfect form of راح / يروح, meaning to go.

After قبل ما, Levantine normally uses the imperfect/present form:

• قبل ما تروح = before you go
• قبل ما آكل = before I eat
• قبل ما ينام = before he sleeps

In English, we also often use a present form after before, so this lines up fairly well.

Because this is everyday Levantine Arabic.

• راح / يروح = to go (common in speech)
• ذهب / يذهب = to go (more formal, MSA)

A native speaker in conversation would normally say تروح, not تذهب.

عالبريد is a contracted colloquial form of على البريد.

In Levantine speech, على الـ often becomes عالـ:

• على البيت → عالبيت
• على المدرسة → عالمدرسة
• على البريد → عالبريد

So عالبريد literally looks like on the mail/post, but in context it means to the post office / to the mail service.

This is one of those places where Arabic and English do not match word-for-word.

In Levantine, على can be used in expressions where English would say to or at, especially with destinations or institutions in everyday speech.

So تروح عالبريد is a natural colloquial way to say go to the post office.

You should learn it as a chunk:

• راح عالبنك = he went to the bank
• راح عالمطار = he went to the airport
• راح عالبريد = he went to the post office

It can refer to mail/post in general, but in this sentence it most naturally means the post office or the postal service.

So تروح عالبريد is understood as go to the post office.

Context decides the exact English translation.

The sentence is:

حط الرسالة بمغلف قبل ما تروح عالبريد

A natural breakdown is:

• حط = put
• الرسالة = the letter
• بمغلف = in an envelope
• قبل ما = before
• تروح = you go
• عالبريد = to the post office

So the structure is basically:

Verb + object + prepositional phrase + time clause

This is very normal in Levantine.

As written, it is addressed to one male because of حط and تروح in this context.

To one female, you would usually say:

حطي الرسالة بمغلف قبل ما تروحي عالبريد

To a group:

حطّوا الرسالة بمغلف قبل ما تروحوا عالبريد

In colloquial speech, some speakers may reduce or blur these endings in fast conversation, but the full forms above are the clearest ones.

Yes, that would be understandable, and in many contexts it is fine.

But بمغلف sounds very natural in Levantine for in an envelope. Native speakers often use بـ where an English speaker might expect a more direct equivalent of in.

So:

• حط الرسالة بمغلف = very natural colloquial Levantine
• حط الرسالة في مغلف = understandable and also possible, depending on speaker and region

Yes, several things:

• حط instead of a formal verb
• قبل ما as a very common spoken structure
• تروح instead of تذهب
• عالبريد as a contraction of على البريد

So the whole sentence sounds like normal everyday spoken Levantine, not textbook Modern Standard Arabic.