عيد تشغيل المودم.

A rough Egyptian pronunciation is ʿeed tashgheel el-modem.

A slightly more careful transliteration is ʿīd tašġīl el-mōdem.

Two sounds to notice:

• ع at the start of عيد is a deep throat sound with no exact English equivalent.
• غ in تشغيل is often like a French or Parisian r.

Word by word:

• عيد = repeat / do again
• تشغيل = operation, switching on, تشغيل
• المودم = the modem

So the literal structure is something like repeat the تشغيل of the modem, which naturally becomes restart the modem.

Yes — عيد can also be the noun Eid/feast/holiday.

But here, from context, عيد is a command verb meaning do again / repeat. In Egyptian Arabic, that is a normal way to say restart in tech language: عيد تشغيل...

So the meaning comes from context, not from the spelling alone.

Because شغّل المودم means turn the modem on.

But عيد تشغيل المودم means turn it on again / restart it.

Arabic often expresses this idea as:

• عيد = do again
• تشغيل = the act of turning on / operating

So عيد تشغيل is the common phrase for restart / reboot.

This is the kind of phrasing you commonly hear in Egyptian Arabic.

In Modern Standard Arabic, you would more often see: أعد تشغيل المودم

The Egyptian version drops the hamza and uses the colloquial form: عيد تشغيل المودم

So if you are learning Egyptian, this sentence is natural.

Because المودم means the modem.

Arabic attaches the definite article directly to the noun:

• مودم = a modem / modem
• المودم = the modem

In Egyptian pronunciation, this is usually said as el-modem.

Yes. As written, عيد تشغيل المودم is a command to one person.

In Arabic, commands change depending on who you are talking to:

• to one man: عيد تشغيل المودم
• to one woman: عيدي تشغيل المودم
• to a group: عيدوا تشغيل المودم

English just says restart the modem, but Arabic makes the person clearer.

A plain command can sound direct, especially with service or customer-support language.

To make it more polite, you can say:

• لو سمحت، عيد تشغيل المودم. = Please restart the modem.
• ممكن تعيد تشغيل المودم؟ = Could you restart the modem?

In everyday Egyptian, ممكن...؟ is a very common softer way to ask.

Usually, yes.

In tech language, عيد تشغيل is the normal way to say:

• restart
• reboot

So for devices like a modem, router, phone, or computer, it strongly suggests turn it off and back on / reboot it, not just switch it on for the first time.

It is a loanword from English modem.

Arabic often writes tech words in Arabic script:

• مودم = modem
• راوتر = router
• كمبيوتر = computer

So the grammar is Arabic, but the device name itself comes from English.