Đời rất đẹp.

Vietnamese often leaves out the verb to be when an adjective directly describes something.

So:

• Đời rất đẹp = literally Life very beautiful
• Natural English: Life is very beautiful

This is completely normal in Vietnamese. With adjectives, you usually do not need a word equivalent to is.

Compare:

• Trời đẹp. = The weather/sky is beautiful.
• Cô ấy đẹp. = She is beautiful.

Here, đời means something like life.

It is a short, somewhat literary or emotional word. Depending on context, đời can suggest:

• life in general
• one’s life
• human life
• the world of ordinary living

In many situations, cuộc đời is a fuller and more explicit way to say life. So:

• Đời rất đẹp sounds shorter, more poetic, and more expressive.
• Cuộc đời rất đẹp sounds a bit fuller and clearer.

Rất means very.

So the structure is:

• đời = life
• rất = very
• đẹp = beautiful

Together:

• Đời rất đẹp = Life is very beautiful

If you remove rất, you get:

• Đời đẹp. = Life is beautiful

So rất simply adds emphasis.

It can definitely describe abstract things too.

Đẹp often means:

• beautiful
• lovely
• fine
• wonderful
• admirable

So in Đời rất đẹp, đẹp is not just about visual beauty. It can also suggest that life is:

• wonderful
• meaningful
• full of goodness

This is a very natural use of đẹp in Vietnamese.

Vietnamese word order here is:

subject/topic + degree word + adjective

So:

• đời = subject/topic
• rất = degree word
• đẹp = adjective

That gives:

• Đời rất đẹp

This is the normal pattern. You would not usually say:

• Rất đẹp đời for this meaning

If you want to describe life as very beautiful, the adjective phrase comes after the noun/topic.

It is understandable and natural, but it has a somewhat poetic or reflective feel.

A speaker might say it:

• in writing
• in a song
• in a thoughtful or emotional moment
• as a short philosophical statement

In more neutral speech, people might also say:

• Cuộc đời rất đẹp.
• Cuộc sống rất đẹp.

These feel a bit more explicit.
Đời rất đẹp is shorter and more expressive.

A rough pronunciation guide is:

• Đời ≈ duh-ee with a falling tone
• rất ≈ zut or rut with a short, cut-off sound and a sharp tone
• đẹp ≈ dep with a low, heavy, cut-off tone

A few pronunciation notes:

• đ is like English d, not like plain d in Vietnamese spelling.
• rất ends in t, so it is unreleased or cut short.
• đẹp ends in p, also cut short.
• The tones are important for sounding correct.

If you are learning tones, it is best to listen to native audio, because tone plus vowel quality matters a lot more than an English-style approximation.

Yes, absolutely.

• Đời rất đẹp = shorter, more poetic, more emotional
• Cuộc đời rất đẹp = more explicit, slightly more standard in many contexts

Both are correct.
The difference is mainly tone and style, not core grammar.

You can think of đời as a compressed, expressive version of cuộc đời in many contexts.

Yes. Đời is a flexible word, and that can confuse learners.

Depending on context, it can refer to:

• life
• a lifetime
• an era or generation
• worldly life
• one’s fate or lot in life

For example, in compounds and expressions it appears in many meanings. So when you see đời, always check the context.

In Đời rất đẹp, the intended sense is clearly life.

A simple negative is:

• Đời không đẹp. = Life is not beautiful.
• Đời không rất đẹp is not natural. Put không before the adjective, not before rất in this kind of sentence.

A natural yes/no question is:

• Đời có đẹp không? = Is life beautiful?

You can also ask more directly in conversation:

• Đời đẹp không?

And for very beautiful, you could say:

• Đời có rất đẹp không? though this is a bit less common than asking about đẹp by itself.