لا الاشارة ثابتة ولا السرعة كويسة.

In Egyptian Arabic, the present-tense to be is usually not stated.

So:

• الاشارة ثابتة = the signal is stable
• السرعة كويسة = the speed is good

Arabic just puts the subject and description next to each other. English needs is, but Egyptian Arabic usually does not in the present.

If you wanted past tense, then you would use a verb, for example:

• الاشارة كانت ثابتة = the signal was stable

This pattern means something like neither ... nor ... or not ... and not ....

So:

• لا الاشارة ثابتة ولا السرعة كويسة

means:

• Neither the signal is stable nor the speed is good
• more naturally in English: The signal isn’t stable, and the speed isn’t good either

In everyday Egyptian Arabic, this structure is a common way to link two negative ideas.

Because الاشارة is grammatically feminine.

In Arabic, adjectives agree with the noun they describe in gender and definiteness.

• اشارة = signal, feminine
• so the adjective becomes feminine too:
  • ثابت = masculine stable
  • ثابتة = feminine stable

Since الاشارة is feminine, you say:

• الاشارة ثابتة

not:

• الاشارة ثابت

كويسة is the feminine form of كويس, a very common Egyptian Arabic word meaning good, fine, okay, or decent depending on context.

• كويس = masculine
• كويسة = feminine

Since السرعة is feminine, the adjective also becomes feminine:

• السرعة كويسة

This is one of the most common adjective pairs in Egyptian Arabic:

• ولد كويس = a good boy
• بنت كويسة = a good girl

It is mainly colloquial, and very common in Egyptian Arabic.

A more formal / Standard Arabic equivalent would often be:

• جيدة

So:

• السرعة كويسة = Egyptian colloquial
• السرعة جيدة = more formal / MSA-style

A learner will hear كويس / كويسة all the time in Egypt.

الاشارة literally means the signal.

In everyday use, depending on context, it can mean:

• phone signal
• internet signal
• reception
• sometimes signal strength more generally

So in this sentence, it most likely refers to mobile or internet reception.

In Egyptian pronunciation, it is often said roughly like el-eshāra.

Because both nouns are definite:

• الاشارة = the signal
• السرعة = the speed

In this sentence, the speaker is talking about a specific signal and a specific speed, not just signal or speed in general.

Also, when a noun is definite in Arabic, its adjective is also definite in meaning, even if the adjective does not separately show the in English translation.

So:

• الاشارة ثابتة = the signal is stable
• not just a signal is stable

It is clearly colloquial and sounds very natural in Egyptian Arabic, especially because of كويسة.

Other Arabic speakers would probably understand it, but some parts are dialectal rather than formal. The sentence is not in full Modern Standard Arabic style.

A more formal version might be closer to:

• الإشارة غير ثابتة والسرعة ليست جيدة

But in everyday Egyptian speech, the original sentence sounds much more natural.

A rough pronunciation would be:

• la el-eshāra sābta w la es-sorʿa kwayyisa

A few helpful notes:

• الاشارة is often pronounced el-eshāra
• ثابتة in Egyptian speech is often pronounced closer to sābta
• السرعة is often es-sorʿa
• كويسة is often kwayyisa

Pronunciation varies by speaker, but that is a useful approximation.

Because in Egyptian Arabic, the letter ث is usually pronounced like s, not like the English th in think.

So:

• ثابتة becomes roughly sābta

Also, short vowels are often reduced in fast speech, which is why learners may hear:

• ثابتة as sābta

instead of a more careful pronunciation.

This is a normal dialect feature.

Yes, you could make each part negative with مش, for example:

• الاشارة مش ثابتة والسرعة مش كويسة

This means essentially the same thing:

• The signal isn’t stable, and the speed isn’t good

The version with لا ... ولا ... is more like neither ... nor ..., while the مش version is a straightforward double negative statement.

Both are natural, but they feel slightly different in structure:

• لا ... ولا ... = more balanced, linked pair
• مش ... ومش ... = simple two-part negation

Not only, but that is probably the most common context.

It could be used for anything where signal and speed matter, such as:

• mobile data
• Wi-Fi
• internet service
• device connection
• network performance

Without context, many listeners would probably assume it is about phone or internet quality.

Because ولا already connects the second negative idea.

Here, ولا does the job of something like and not / nor.

So the structure is:

• لا
  • first statement
• ولا
  • second statement

That is why you do not need an extra و before السرعة.

Word-for-word, it is something like:

• Not the signal stable, nor the speed good

But natural English would be:

• Neither the signal is stable nor the speed is good
• or more naturally:
• The signal isn’t stable, and the speed isn’t good either

This is a good example of how Arabic often expresses ideas with a different structure from English, even when the meaning is straightforward.