النقاش بيعمل الدهان.

Not in this sentence.

Here النقاش means the painter / decorator, specifically someone who paints walls, doors, apartments, etc.

This is a good thing to notice because unvowelled Arabic spelling can be ambiguous:

• النقّاش = the painter / decorator
• النقاش / النِقاش = the discussion

In normal writing, those can look the same, but the meaning is clear from context. بيعمل الدهان fits the painter, not the discussion.

A rough Egyptian pronunciation is:

en-naʔʔāsh biyeʿmel ed-dehān

A few helpful notes:

• ق in many Egyptian pronunciations becomes a glottal stop ʔ
• the qq sound in naʔʔāsh is doubled
• ع in بيعمل is the Arabic sound ʿ, which has no exact English equivalent
• الـ changes in pronunciation before certain letters, so you hear en- and ed-, not a clear al-

Because ن and د are sun letters.

In Arabic, when الـ comes before a sun letter, the l sound assimilates to the next consonant:

• النقاش is pronounced en-naʔʔāsh
• الدهان is pronounced ed-dehān

In writing, the spelling still uses الـ, but in speech the pronunciation changes.

بيعمل comes from the verb عمل = to do / make.

In Egyptian Arabic:

• يعمل = he does / he works / he makes
• بيعمل = the normal present-tense form used in everyday speech

So بيعمل can mean:

• he does
• he is doing
• sometimes he works on

In this sentence, it means something like does / is doing the painting work.

It can mean either one, depending on context.

In Egyptian Arabic, the bi- form often covers both:

• present habitual: he does
• present ongoing: he is doing

So النقاش بيعمل الدهان could mean:

• The painter does the painting
• The painter is doing the painting

The surrounding context tells you which one is intended.

Egyptian often uses عمل + noun to express doing a job or carrying out some work.

So بيعمل الدهان is like saying:

• he does the painting
• he is doing the paint job

There is also a more direct verb:

• بيدهن = he paints / he is painting

So these are both possible, but they are not exactly identical in feel:

• بيدهن focuses more directly on the act of painting
• بيعمل الدهان can sound more like doing the painting work / handling the paint job

Here الدهان refers to the painting / the paintwork / the paint job.

Depending on context, دهان can refer to:

• paint as a material
• painting as a task
• paintwork or the finished painted surface

In this sentence, it most naturally refers to the painting work.

Because subject + verb + object is very common in Egyptian Arabic, especially in everyday speech.

So:

• النقاش = the subject
• بيعمل = the verb
• الدهان = the object

This SVO order feels very natural in spoken Egyptian.

In more formal Arabic, verb-first order is also common, but colloquial Egyptian often prefers starting with the subject.

Because the sentence is talking about:

• the painter
• the painting / the paint job

The prefix الـ means the.

So:

• النقاش = the painter
• الدهان = the painting / the paintwork

If you removed الـ, the meaning would become more indefinite, like a painter or painting/paint in a less specific sense.

A few possible MSA-style equivalents are:

• النقّاش يدهَن
• النقّاش يقوم بالدهان

The differences are:

• Egyptian uses بيعمل
• MSA would not use the Egyptian bi- present marker
• Egyptian everyday speech is less formal and usually has no case endings

So the given sentence is clearly colloquial Egyptian, not MSA.

A common Egyptian negative form is:

النقاش ما بيعملش الدهان

This uses the Egyptian pattern:

• ما ... ش

So:

• بيعمل = he does / he is doing
• ما بيعملش = he does not do / he is not doing

That gives:

• The painter is not doing the painting
• The painter doesn't do the painting

Because this is Egyptian Arabic, not fully inflected Modern Standard Arabic.

In everyday Egyptian speech:

• case endings are normally not pronounced
• the grammar is simpler in that respect
• you usually hear the bare spoken forms

So instead of formal endings, you get the natural colloquial sentence:

النقاش بيعمل الدهان

That is exactly what you would expect in spoken Egyptian.