طفاية الحريق جنب المثلث العاكس.

A natural Egyptian pronunciation is:

ṭafāyet el-ḥarīʔ gamb el-mosallas el-ʿākes

A few useful notes:

• ال is usually pronounced el- in Egyptian Arabic.
• ج in جنب is usually pronounced g in Egyptian, not j.
• ق in الحريق is commonly pronounced as a glottal stop ʔ in Egyptian, so ḥarīʔ.
• Many speakers say gamb rather than ganb/janb because the n sound shifts toward m before b.

Because this is a normal present-tense nominal sentence in Arabic.

In Egyptian Arabic, if you want to say X is next to Y, you usually do not use a separate word for is in the present tense. So:

• طفاية الحريق جنب المثلث العاكس
• literally: the fire extinguisher next to the reflective triangle
• natural English meaning: The fire extinguisher is next to the reflective triangle

This is very common in Arabic. The linking verb is/are is simply understood.

Because it is followed by another noun: الحريق.

In Egyptian Arabic, when a feminine noun ending in ة is linked to a following noun in a construct phrase, the ending is commonly pronounced -et. So:

• by itself: طفاية → roughly ṭafāya
• before another noun: طفاية الحريق → ṭafāyet el-ḥarīʔ

This is very common with feminine nouns in connected speech.

Yes. It is a construct phrase (often called iḍāfa).

The basic idea is:

• noun + noun
• literally something like extinguisher of the fire

But in natural English, this is just fire extinguisher.

Important things about this pattern:

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

So in طفاية الحريق:

• طفاية = extinguisher
• الحريق = the fire
• together = the fire extinguisher

Because in a construct phrase, the first noun usually does not take ال.

So Arabic does not normally say:

• الطفاية الحريق for this structure

Instead, it says:

• طفاية الحريق

Even though طفاية itself has no ال, the whole phrase can still be definite because the second noun الحريق is definite.

That is one of the key features of the construct pattern.

جنب means beside, next to, or by the side of.

In this sentence, it tells you the location of the fire extinguisher relative to the reflective triangle.

So:

• جنب المثلث العاكس = next to the reflective triangle

In Egyptian Arabic, جنب is very commonly used this way. You may also hear بجنب in speech, which has a very similar meaning.

Because in Arabic, adjectives normally come after the noun they describe.

So:

• المثلث = the triangle
• العاكس = reflective

Together:

• المثلث العاكس = the reflective triangle

This is the normal Arabic order:

• noun + adjective

not

• adjective + noun

as in English.

Because the adjective must match the noun in definiteness.

Here, المثلث is definite: the triangle.
So the adjective must also be definite:

• المثلث العاكس
• not المثلث عاكس

This matching is very important in Arabic adjectives. The adjective usually agrees with the noun in:

• definiteness
• gender
• number

Here both words are masculine singular definite, so they match.

There are two pronunciation points here.

First, in Egyptian Arabic:

• ج is usually pronounced g

So جنب starts with g, not j.

Second, the n sound often shifts toward m before b in natural speech. So:

• underlying form: ganb or janb
• natural Egyptian pronunciation: gamb

This kind of sound change is very normal and makes pronunciation smoother.

In Egyptian Arabic, الحريق is commonly pronounced:

el-ḥarīʔ

Key points:

• ح is a strong, breathy h sound from the throat
• ق is often pronounced as a glottal stop ʔ in Egyptian speech
• so you do not usually say a hard q sound here in everyday Egyptian Arabic

So a learner should aim for something like:

el-ḥa-reeʔ

They can definitely shorten it if the context is clear.

In everyday speech, someone might simply say:

• الطفاية = the extinguisher

if everyone already knows what object is meant.

But the full phrase طفاية الحريق is perfectly natural and especially clear in:

• safety instructions
• official labels
• vehicle equipment lists
• situations where you want to avoid ambiguity

So both are possible; the full version is just more explicit.