هذا خيار جيد.

A natural word-by-word breakdown is:

• هذا = this
• خيار = choice / option
• جيد = good

So the whole sentence means:

• This is a good choice
• or This is a good option

Depending on context, خيار can mean either choice or option.

In Arabic, the verb to be in the present tense is usually not written or said in simple sentences like this.

So:

• هذا خيار جيد literally looks like this good option
• but it means This is a good option

This is very normal in Arabic.
Compare:

• هو طالب = He is a student
• الجو جميل = The weather is beautiful

There is no present-tense is in these sentences either.

In Arabic, adjectives usually come after the noun they describe.

So:

• خيار جيد = a good choice
• literally: choice good

This is different from English, where adjectives usually come before the noun.

More examples:

• كتاب جديد = a new book
• بيت كبير = a big house

Because خيار is a masculine noun, the adjective must also be masculine.

• خيار = masculine
• جيد = masculine form of good
• جيدة = feminine form

Arabic adjectives must agree with the noun in:

• gender
• number
• definiteness
• often case as well

So with خيار, you use جيد, not جيدة.

In this sentence, خيار meaning choice/option is treated as masculine.

That is why the adjective is:

• جيد and not جيدة

A learner may notice that خيار can also mean cucumber. That word is also masculine.

Because هذا is the demonstrative used with masculine singular nouns.

• هذا = this for masculine singular
• هذه = this for feminine singular

Since خيار is masculine singular, we say:

• هذا خيار جيد

If the noun were feminine, you would use هذه instead.

For example:

• هذه فكرة جيدة = This is a good idea

Because the sentence means This is a good choice / option, not This is the good choice / option.

Here, خيار is indefinite:

• خيار = a choice / an option

If you said:

• هذا الخيار جيد

that would mean:

• This option is good
• or This particular choice is good

So the version without ال is more like introducing or classifying something:
This is a good option.

They are similar, but not exactly the same.

1. هذا خيار جيد

Means:

• This is a good option
• This is a good choice

Here, خيار is indefinite: a good option.

2. هذا الخيار جيد

Means:

• This option is good
• This choice is good

Here, الخيار is definite: the option / this specific option.

So the difference is mostly about indefinite vs. definite.

A simple learner-friendly pronunciation is:

• hādhā khiyār jayyid

A few notes:

• هذا = hādhā
• خ is a throat sound, often written kh
• خيار = khiyār
• جيد = jayyid

The hardest sound for many English speakers is خ. It is like the ch in Scottish loch or German Bach, not like English k.

This is a nominal sentence in Arabic, called جملة اسمية.

A simple way to analyze it is:

• هذا = the topic / subject-like part
• خيار جيد = the predicate / description

So the sentence structure is roughly:

• This
  • a good option

In traditional grammar:

• هذا is the مبتدأ
• خيار is the خبر
• جيد describes خيار, so it is an adjective

In fully vowelled formal Arabic, yes.

It would typically be:

• هٰذا خِيارٌ جَيِّدٌ

Why?

• خيارٌ is nominative because it is the predicate of the nominal sentence
• جيدٌ follows خيار as an adjective, so it also takes nominative

In normal modern writing, these endings are usually not written, so you will often just see:

• هذا خيار جيد

Yes. Because جيد is an adjective describing خيار, it must agree with it.

Here they match in:

• gender: masculine
• number: singular
• definiteness: both indefinite
• case: both nominative in full grammar

That is why you get:

• خيار جيد

and not something mismatched like:

• خيار جيدة
• or الخيار جيد if you still mean a good option

Yes. خيار can also mean cucumber.

Arabic often has words with more than one meaning, and context tells you which meaning is intended.

So:

• هذا خيار جيد = This is a good choice/option

not:

• This is a good cucumber

Even though, taken by itself, خيار can also mean cucumber, the adjective جيد and the overall context usually make the intended meaning clear.

Yes, this is a natural and correct sentence in Modern Standard Arabic.

It works well in contexts like:

• discussing plans
• giving advice
• evaluating alternatives
• writing formal or neutral Arabic

For example:

• السفر غدًا؟ هذا خيار جيد.
  Travel tomorrow? That’s a good option.

In everyday spoken Arabic, dialects may use different words or phrasing, but this sentence is perfectly normal in MSA.