ينطفئ ضوء الطوارئ.

In careful MSA pronunciation, it is:

yanṭafiʾu ḍawʾu ṭ-ṭawāriʾi

A few helpful notes:

• ينطفئ has a hamza at the end: a little catch in the throat, -fiʾ.
• ض in ضوء is an emphatic d sound, often written ḍ.
• ط in الطوارئ is also emphatic, written ṭ.
• In الطوارئ, the l of ال is absorbed into ط, so you hear aṭ-ṭawāriʾ at the beginning of speech, or just ṭ-ṭawāriʾ after a previous word.

In everyday reading, people often do not pronounce the full case endings.

Because this is a very common Arabic sentence pattern: verb + subject.

So:

ينطفئ ضوء الطوارئ
literally follows the order goes out the emergency light.

This verb-first order is very normal in MSA, especially for a neutral statement.

You can also say:

ضوء الطوارئ ينطفئ

That is also correct, but it puts more focus on ضوء الطوارئ as the topic.

ينطفئ is:

• imperfect verb (often called present tense)
• 3rd person
• masculine
• singular

Its dictionary form is انطفأ.

So ينطفئ means it goes out, it turns off, or it is going out, depending on context.

It is used for things like lights, flames, or anything that stops shining or burning.

Because the subject is ضوء:

• ضوء = light
• it is masculine singular

So the verb matches it:

• ينطفئ = masculine singular

Even though الطوارئ is plural in form, it is not the main subject here. The head noun of the phrase is ضوء, so that is what controls agreement.

This is an important distinction:

• ينطفئ = it goes out / turns off

  • intransitive
  • the thing itself goes out

• يُطفِئ = he/it turns off / extinguishes

  • transitive
  • someone or something turns another thing off

• يُطفَأ = it is turned off / extinguished

  • passive

So in this sentence, ينطفئ means the emergency light goes out, not that someone turns it off.

Because this is an iḍāfa construction, also called a construct phrase.

Structure:

• ضوء = light
• الطوارئ = emergencies / emergency

Together:

ضوء الطوارئ = the emergency light
literally: light of emergencies

In Arabic iḍāfa:

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

So ضوء الطوارئ is correct, while الضوء الطوارئ is not the normal MSA structure here.

Because Arabic often uses الطوارئ literally emergencies in fixed expressions that English translates with singular emergency.

For example:

• مخرج الطوارئ = emergency exit
• قسم الطوارئ = emergency department
• ضوء الطوارئ = emergency light

So although the Arabic word is plural in form, the whole phrase is the normal way to say emergency light.

In full formal vocalization, the sentence is:

يَنطَفِئُ ضَوْءُ الطَّوَارِئِ

Here is why:

• ينطفئُ ends in -u because it is in the indicative
• ضوءُ is nominative because it is the subject
• الطوارئِ is genitive because it is the second noun in an iḍāfa

Also, ضوء does not take tanwīn here because in an iḍāfa the first noun does not take tanwīn.

Because Arabic verbs already contain subject information.

ينطفئ by itself already means:

• it goes out or
• he goes out

The exact meaning depends on context.

Since the sentence already names the subject explicitly as ضوء الطوارئ, there is no need for an extra word meaning it.

The Arabic imperfect can express:

• present
• near future
• habitual action

So ينطفئ ضوء الطوارئ can mean something like:

• the emergency light goes out
• the emergency light is going out

If you want to make the future clearer, Arabic often adds سـ or سوف:

• سينطفئ ضوء الطوارئ = the emergency light will go out
• سوف ينطفئ ضوء الطوارئ = the emergency light will go out