العلاقة بين اللاعبين مهمة.

Because Arabic often leaves out the present-tense to be.

So العلاقة بين اللاعبين مهمة literally looks like the relationship between the players important, but it means The relationship between the players is important.

This is very normal in both Standard Arabic and Levantine. If you wanted past tense, you would usually add something like كان (was).

Because مهمة here is the predicate of the sentence, not an adjective inside the noun phrase.

• العلاقة المهمة = the important relationship
• العلاقة مهمة = the relationship is important

That is a very important difference in Arabic.
In your sentence, مهمة is telling us something about العلاقة بين اللاعبين, so it stays without ال.

Because it matches العلاقة, which is a feminine noun.

In Arabic, when a word describes a noun, it usually agrees with it in gender.
Here, the thing being described as important is العلاقة (the relationship), not اللاعبين (the players).

So:

• العلاقة = feminine singular
• مهمة = feminine singular

That match is exactly what we expect.

This is a very common question.

In spoken Levantine, the masculine plural ending is very often -ين in general, so اللاعبين sounds normal.

In formal Arabic, بين is followed by the genitive, and the sound masculine plural takes -ين in the genitive, so you also get اللاعبين.

So in this sentence, اللاعبين makes sense in both ways:

• natural for Levantine speech
• also correct in formal grammar after بين

بين means between or sometimes among, depending on context.

In this sentence:

• بين اللاعبين = between the players

It is used before the people or things that are being connected or compared.

A few similar examples:

• بيني وبينك = between me and you
• بين الطلاب = among the students
• بين الفريقين = between the two teams

So here it shows the relationship exists in the space or interaction connecting the players.

ال usually corresponds to the, but Arabic uses definiteness a bit differently from English.

Here:

• العلاقة = the relationship
• اللاعبين = the players

In Arabic, definite forms are often used where English might sound more general. So this can still work even if English would sometimes say something like relationships between players are important in a different context.

If you removed ال from لاعبين and said بين لاعبين, it would sound more like between players / between some players, less specific.

A natural Levantine-style pronunciation would be roughly:

el-ʿalāʔa bēn il-lāʿbīn mhimme

A few notes:

• العلاقة → el-ʿalāʔa
  • the ع is the deep throat sound ʿ
  • the ء in علاقة is a glottal stop, like a small catch in the voice
• بين → bēn
• اللاعبين → il-lāʿbīn
  • the ل of ال merges into the next ل, so you hear a doubled l
• مهمة → often mhimme in casual Levantine speech

If you pronounce it a bit more carefully or formally, muhimme is also possible.

It is understandable and correct, but it sounds a bit neutral to formal.

In semi-formal speech, news, sports commentary, or careful conversation, it sounds fine.

In very casual Levantine, some speakers might choose a more colloquial plural for players, depending on region, but your sentence is still perfectly usable and clear.

So a good way to think of it is:

• correct and natural enough
• slightly more formal than the most casual everyday phrasing

Yes, depending on the region, a more casual version might use a more colloquial word for players.

For example, some speakers may say:

العلاقة بين اللعيبة مهمة

This keeps the same structure but sounds more everyday.

That said, اللاعبين is still widely understandable and often preferred in more careful speech, sports discussion, or writing.

Not in Levantine.

In everyday Levantine speech, you normally do not pronounce the full case endings that you learn in formal Arabic grammar.

So you would just say:

العلاقة بين اللاعبين مهمة

without adding formal ending vowels.

If you were reading it in fully formal Standard Arabic, it would be something like:

العلاقةُ بينَ اللاعبينَ/اللاعبينِ مهمةٌ

But in Levantine speech, those endings are usually dropped.

You usually want to keep this order:

العلاقة بين اللاعبين مهمة

This is the most natural and straightforward structure:

• topic / subject first
• then the comment about it

You can change word order in Arabic for emphasis, but that often sounds more marked or literary. For a learner, this sentence is the best order to use.

So as a default:

• العلاقة بين اللاعبين مهمة = natural
• other orders = possible in special cases, but not the safest choice for everyday use