التواصل المهني خلال استراحة القهوة.

Not really. It is a noun phrase, not a full sentence with a verb.

This is very common in Arabic for:

• headings
• chapter titles
• slide titles
• topic labels

So it works like English Professional networking during the coffee break as a title or label. If you wanted a full sentence, you would add a verb, for example:

يحدث التواصل المهني خلال استراحة القهوة
Professional networking happens during the coffee break

التواصل is a verbal noun or maṣdar. It comes from the verb تواصَلَ.

So grammatically, it behaves like a noun, even though in English it may translate as:

• communication
• interaction
• networking

This is very common in Arabic: a maṣdar can express an action as a noun, much like English communication or discussion.

No. التواصل المهني is not an iḍāfa. It is:

• التواصل = noun
• المهني = adjective describing that noun

A good clue is that both words have ال. In Arabic, that usually shows noun + adjective agreement, not iḍāfa.

So:

• التواصل المهني = the professional communication / professional networking

If it were an iḍāfa, the first word would normally not take ال.

Because it must agree with التواصل, which is treated as masculine singular.

Arabic adjectives agree with the noun they describe in:

• gender
• number
• definiteness
• case

So since التواصل is:

• masculine
• singular
• definite

the adjective must also be:

• masculine: مهني
• singular
• definite: المهني

That is why you get التواصل المهني, not التواصل المهنية.

خلال means during here.

It introduces the time expression:

• خلال استراحة القهوة = during the coffee break

In grammar terms, خلال functions like a preposition-like word or ظرف, and the noun after it is read in the genitive.

So:

• خلالَ استراحةِ القهوةِ

Even if short vowels are not written in normal text, that is the underlying structure.

Because it is the first word of an iḍāfa:

• استراحة القهوة

In an iḍāfa, the first noun usually:

• does not take ال
• becomes definite through the second noun if the second noun is definite

So:

• استراحة = first term of the construct
• القهوة = second term

Together they mean something like the coffee break.

This is why الاستراحة القهوة would be wrong here.

Because it is the second part of the iḍāfa and it is definite.

In استراحة القهوة:

• القهوة is definite
• that makes the whole phrase definite

So the structure is:

• استراحة = break
• القهوة = the coffee

Together: the coffee break

This is a normal Arabic pattern:

• باب البيت = the door of the house
• استراحة القهوة = the coffee break

Because ت is a sun letter.

When ال comes before a sun letter, the l sound assimilates to the next consonant. So:

• written: التواصل
• pronounced: at-tawāṣul

But in:

• المهني the م is a moon letter, so you pronounce the l: al-mihnī
• القهوة the ق is also a moon letter, so: al-qahwa

So the phrase is pronounced roughly:

at-tawāṣul al-mihnī khilāla istirāḥat al-qahwa

Because it ends in ة (tāʾ marbūṭa).

When a word with ة is said by itself in pause, it usually sounds like:

• -a or -ah

So alone:

• استراحة = istirāḥa

But when it is in an iḍāfa or followed by a grammatical ending, the ة is pronounced as t:

• استراحة القهوة = istirāḥat al-qahwa
• fully inflected: استراحةِ القهوةِ = istirāḥati l-qahwati

This is a very important pronunciation rule in Arabic.

A fully vocalized version is:

التَّواصُلُ المِهْنِيُّ خِلالَ اسْتِراحَةِ القَهْوَةِ

A few notes:

• التَّواصُلُ: nominative here if treated as the main noun of the phrase
• المِهْنِيُّ: adjective agreeing with التواصل
• خِلالَ: normally read with fatḥa
• اسْتِراحَةِ: genitive after خلال
• القَهْوَةِ: genitive as the second term of the iḍāfa

In everyday writing, these endings are usually omitted, so you normally just see:

التواصل المهني خلال استراحة القهوة