لقيت مفتاح بجيبة البنطلون.

A common Levantine pronunciation would be something like lʔeet mftaah b-jeebet il-banTaloon.

A few notes:

• لقيت is often pronounced with a glottal stop for ق in many Levantine accents: lʔeet
• بـ is attached to the next word: b-jeebet
• جيبة البنطلون is usually pronounced jeebet il-banTaloon

Exact pronunciation can vary by country, city, and speaker.

لقيت means I found.

In Arabic, the verb usually already tells you who did the action. So:

• لقيت = I found
• you do not need أنا unless you want emphasis or contrast

So:

• لقيت مفتاح... = I found a key...
• أنا لقيت مفتاح... = I found a key... with extra emphasis on I

Because Arabic does not have an indefinite article like English a/an.

So:

• مفتاح = a key
• المفتاح = the key

In this sentence, مفتاح is indefinite, so it naturally means a key.

Here, بـ means in or inside.

So:

• بجيبة البنطلون = in the pants pocket / in the pocket of the pants

In Levantine, بـ is very common for location, and depending on context it can correspond to English in, at, or sometimes with.

Because بـ is a short preposition that is written as a prefix in Arabic.

So Arabic writes:

• بجيبة

not:

• ب جيبة

This is normal for several very common particles and prepositions in Arabic.

This is an idafa construction, often called a possessive or noun-linking structure.

جيبة البنطلون literally means:

• the pocket of the pants

More naturally in English:

• the pants pocket
• the pocket of the pants

In an idafa:

• the first noun usually does not take ال
• the second noun can take ال if the whole phrase is definite

So:

• جيبة البنطلون = the pocket of the pants
• not الجيبة البنطلون

Because جيبة ends in ة (taa marbuuTa).

In Levantine, that ending is often pronounced:

• -a / -e when the word stands alone
• -et when followed by another word in an idafa

So:

• جيبة alone → jeebe / jeeba
• جيبة البنطلون → jeebet il-banTaloon

That -t sound appears because the noun is directly linked to the next noun.

In Arabic, بنطلون is treated as a singular noun even though English often uses the plural-looking word pants.

So Arabic says, literally:

• the pants with singular grammar

This is similar to how different languages package clothing words differently. English says pants, but Arabic uses a singular noun: بنطلون.

Yes, definitely.

Both can work:

• بجيبة البنطلون
• في جيبة البنطلون

For many learners, في feels easier at first because it clearly matches English in.

But بـ is very common and natural in Levantine everyday speech, so the sentence as written sounds colloquial and normal.

In many urban Levantine accents, ق is pronounced as a glottal stop ʔ rather than a full q sound.

So لقيت often sounds like:

• laʔeet
• or roughly l'eet

However, pronunciation of ق varies across the Levant:

• some speakers use a glottal stop
• some use q
• some use g

So the written form stays the same, but the spoken form can differ by region and speaker.

Because this is colloquial Levantine Arabic, not formal written MSA.

In everyday Levantine speech:

• case endings are generally not pronounced
• tanween is not used the way it is in MSA

So you simply get:

• مفتاح

not:

• مفتاحًا

That is completely normal in spoken Arabic.

A more formal MSA version would be something like:

وجدتُ مفتاحًا في جيب البنطال

Compared with the Levantine sentence:

• لقيت instead of وجدتُ
• بـ instead of في is common in speech
• جيبة instead of جيب
• البنطلون is a common colloquial word, while البنطال is more formal

So the original sentence is clearly everyday spoken Levantine.