الراوتر لاسلكي.

In Arabic, the verb to be is usually not expressed in the present tense.

So:

الراوتر لاسلكي
literally looks like the router wireless,
but it means The router is wireless.

This is very normal in both Standard Arabic and Egyptian.

If you wanted a different tense, then a word like كان or هيكون would appear, for example:

الراوتر كان لاسلكي = The router was wireless
الراوتر هيكون لاسلكي = The router will be wireless

الـ is the Arabic definite article, like the in English.

So الراوتر means the router.

Even though راوتر is a borrowed word from English, Arabic still treats it like a normal noun and can add الـ to it.

Also, because the word begins with ر, the ل of الـ is not fully pronounced. So الراوتر is pronounced more like er-rāwter or ir-rāwter, with a doubled r sound.

Because here لاسلكي is the predicate adjective: it tells you something about the router.

In Arabic, when you say X is Y, the second part usually does not take الـ.

So:

الراوتر لاسلكي = The router is wireless

But if you say:

الراوتر اللاسلكي

that usually means the wireless router — a noun phrase, not a full sentence.

So the difference is:

• الراوتر لاسلكي = The router is wireless
• الراوتر اللاسلكي = The wireless router

This is a very important distinction.

الراوتر لاسلكي is a complete sentence:

• الراوتر = the router
• لاسلكي = wireless

So: The router is wireless.

الراوتر اللاسلكي is just a noun phrase:

• the wireless router

There is no is idea there. It is simply one noun being described by an adjective.

English often uses word order to show this difference:

• The router is wireless → sentence
• The wireless router → noun phrase

Arabic shows it partly through the presence or absence of الـ on the adjective.

Historically, yes, the word is built from the idea of not / without + wire.

• سلك = wire
• سلكي = wired / wire-based
• لاسلكي = wireless

But for a learner, it is best to treat لاسلكي as one vocabulary word meaning wireless.

So in this sentence, don’t think of it as normal sentence negation. It is just the adjective wireless.

A good approximate pronunciation is:

la-SIL-ki

with the stress on SIL.

A slightly more careful pronunciation would be something like:

laa-sil-ki

In Egyptian speech, vowels may vary a little, but la-SIL-ki is a very good learner approximation.

It is correct and understandable, and Egyptians would understand it easily.

But لاسلكي sounds a bit more formal or Standard-Arabic-like than some everyday tech speech.

In casual Egyptian, many people might also say:

الراوتر وايرلس
or
الراوتر ده وايرلس

using the English loanword وايرلس for wireless.

So:

• الراوتر لاسلكي = correct, clear, slightly more formal
• الراوتر وايرلس = very common in everyday speech

Yes. Adjectives in Arabic normally agree with the noun in gender and number.

Since الراوتر is treated as masculine singular, the adjective is also masculine singular:

الراوتر لاسلكي

If the noun were feminine, the adjective would change too. For example:

السماعة لاسلكية = The headset / speaker is wireless

So لاسلكي is the masculine form, and لاسلكية is the feminine form.

In Egyptian Arabic, the normal way is:

الراوتر مش لاسلكي

Here مش means not.

So:

• الراوتر لاسلكي = The router is wireless
• الراوتر مش لاسلكي = The router is not wireless

This is the standard Egyptian way to negate this kind of sentence.

Usually, for a basic sentence like this, الراوتر لاسلكي is the normal and safest order.

That pattern is:

subject + adjective/predicate

So:

الراوتر لاسلكي

If you change the order, it may sound unnatural, incomplete, or like a different structure.

In everyday Egyptian, you might also hear:

الراوتر ده لاسلكي

which adds ده and sounds very natural in speech, especially if you are pointing out a particular router.