السباح غطس بالمي العميقة، ونظارة السباحة طفت عالمي.

In Levantine, مي means water. So بالمي is بـ + الـ + مي, literally in the water.

With a verb like غطس (dove / plunged), English may translate it as into the water, even though Arabic uses بـ here.

A more formal or Standard Arabic version would usually use الماء instead. So مي is one of the clearest colloquial Levantine features in the sentence.

Because مي is treated as a feminine noun, so the adjective has to match it.

• المي = the water
• العميقة = the deep

In Arabic, adjectives agree with the noun in:

• gender
• number
• definiteness

So since المي is feminine and definite, the adjective must also be feminine and definite: العميقة.

Because in Levantine, subject + verb word order is very common in everyday speech.

So:

• السباح غطس = the swimmer dove
• غطس السباح is also possible, but it sounds more narrative or more formal/Standard-Arabic-like

A learner will often notice that spoken Levantine prefers SVO much more than Standard Arabic does.

غطس means to dive, to plunge, or to go underwater.

In this sentence, it means the swimmer dived into the deep water.

Depending on context, غطس can suggest:

• diving underwater
• submerging
• plunging into water

So it is a very natural verb here.

نظارة السباحة is an iḍāfa construction, often called a possessive or noun-noun construction.

Literally, it is something like:

• نظارة = glasses / a pair of glasses
• السباحة = swimming

So نظارة السباحة means swimming goggles.

Arabic often uses a singular noun where English uses something plural-looking like goggles or glasses. So even though English says goggles, Arabic can naturally use singular نظارة.

You may also hear نظارات السباحة, but نظارة السباحة is very understandable.

Because the subject is نظارة السباحة, and the head noun نظارة is grammatically feminine singular.

So the verb has to match:

• نظارة السباحة طفت = the swimming goggles floated

Even though in English goggles looks plural, Arabic is treating نظارة as a singular feminine noun, so the verb is singular feminine too.

In this sentence, عالمي is almost certainly meant as a dialect spelling of عَ المي or عال مي, meaning on the water or on top of the water.

So the idea is:

• طفت عَ المي = it floated on the water

As written, عالمي is confusing, because in normal spelling it can look like:

• global / international
• or something like my world

So for a learner, the clearest way to read the intended meaning here is عَ المي.

Because the two prepositions express different relationships to the water:

• بالمي = in the water / into the water
• عَ المي = on the water

So:

• the swimmer dives into the water
• the goggles float on the water

That difference is very natural.

Because Arabic adjectives match the noun in definiteness as well.

So if the noun is definite:

• المي = the water

then the adjective must also be definite:

• العميقة = the deep

That is why Arabic says the water the-deep, where English simply says the deep water.

A rough Levantine-style pronunciation would be:

is-sabbāḥ ghaṭas bil-mayy l-ʿamīʔa, w naẓẓāret is-sbāḥa ṭefit ʿal-mayy

A few useful pronunciation notes:

• السباح is pronounced more like is-sabbāḥ, because س is a sun letter, so the l sound of الـ assimilates.
• المي keeps the l sound, because م is not a sun letter.
• In نظارة السباحة, the ة of نظارة is pronounced, because it is in an iḍāfa construction, so you hear something like naẓẓāret.
• In many Levantine accents, ق in عميقة is pronounced as a glottal stop, so something like ʿamīʔa.

It feels like a mix, which is very common in written dialect Arabic.

Clearly colloquial Levantine parts include:

• مي
• بالمي
• عَ المي

Other parts, like السباح and العميقة, are also understandable and usable, but the overall style is a bit mixed between colloquial and more neutral/standard-looking Arabic.

That is normal in informal Arabic writing: people often mix:

• dialect words
• standard spelling
• and spoken-style phrasing

So a learner should not be surprised by that.