Nước ép này hơi chua.

In Vietnamese, demonstratives like này usually come after the noun.

So:

• nước ép này = this juice
• literally, it is closer to juice this

This is a very common word order pattern in Vietnamese:

• cái bàn này = this table
• người đó = that person
• cuốn sách kia = that book over there

So Nước ép này... is the normal way to say This juice...

Vietnamese often does not use a verb like to be before adjectives.

In English, you say:

• This juice is a little sour.

In Vietnamese, you can simply say:

• Nước ép này hơi chua.

The pattern is:

• noun phrase + degree word + adjective

So:

• nước ép này = this juice
• hơi = a little / slightly
• chua = sour

Using là here would sound unnatural. Là is not normally used before descriptive adjectives in sentences like this.

Hơi means a little, slightly, or rather.

In this sentence, it softens the adjective chua:

• chua = sour
• hơi chua = a little sour / slightly sour

It is often used when giving a mild opinion, especially about something a bit negative or less than ideal.

Compare:

• Nước ép này chua. = This juice is sour.
• Nước ép này hơi chua. = This juice is a little sour.
• Nước ép này rất chua. = This juice is very sour.
• Nước ép này chua quá. = This juice is too sour / so sour.

So hơi makes the statement gentler.

In food and drink contexts, yes, chua usually means sour or acidic in taste.

Examples:

• chanh chua = lemon is sour
• sữa chua = yogurt
• canh này hơi chua = this soup is a little sour

It can also appear in other expressions, but in this sentence it clearly refers to taste.

Nước ép means juice, especially juice made by pressing or extracting from fruit or vegetables.

Breakdown:

• nước = water / liquid / drink
• ép = press / squeeze

So nước ép is literally something like pressed liquid.

You may also see:

• nước cam ép = orange juice
• nước táo ép = apple juice
• nước trái cây = fruit juice

In everyday speech, nước ép is very natural for juice.

Yes. Nước ép này chua is grammatically correct.

The difference is tone and strength:

• Nước ép này chua. = This juice is sour.
• Nước ép này hơi chua. = This juice is a little sour.

Without hơi, the statement is more direct and stronger. With hơi, it sounds softer and more moderate.

Because the sentence is talking about the juice itself, not a counted object like a glass, a bottle, or a carton.

Vietnamese classifiers are commonly used when counting nouns or specifying a concrete item. But here, nước ép is treated like a substance or drink.

So:

• Nước ép này hơi chua. = This juice is a little sour.

If you wanted to talk about a specific container, you could say:

• Ly nước ép này hơi chua. = This glass of juice is a little sour.
• Chai nước ép này hơi chua. = This bottle of juice is a little sour.

A rough pronunciation guide is:

• Nước ≈ nwoo-uk with a rising tone and a short, clipped ending
• ép ≈ ape with a rising tone, but shorter
• này ≈ nye with a falling tone
• hơi ≈ something like huh-ee or hoy-uh said smoothly, level tone
• chua ≈ choo-uh or joo-uh, level tone

Tones matter:

• nước = rising tone
• ép = rising tone
• này = falling tone
• hơi = level tone
• chua = level tone

Also, Vietnamese pronunciation varies somewhat by region, so exact sound can differ.

Yes, it is completely natural.

Nước ép này hơi chua. sounds like a normal everyday comment about taste. It is the kind of thing someone might say in a restaurant, at home, or when tasting a drink.

It sounds neutral and fairly polite because hơi softens the criticism.

If you wanted to sound even softer, you could say:

• Mình thấy nước ép này hơi chua. = I think this juice is a little sour.
• Nước ép này hơi chua nhỉ. = This juice is a little sour, isn’t it?

Yes, but the meaning changes slightly.

• này = this, near the speaker
• đó = that, near the listener or already mentioned
• kia = that over there, farther away

So:

• Nước ép này hơi chua. = This juice is a little sour.
• Nước ép đó hơi chua. = That juice is a little sour.
• Nước ép kia hơi chua. = That juice over there is a little sour.

All are grammatical; they just differ in distance or reference.

Normally, no. Nước ép specifically means juice, not smoothie.

A smoothie would usually be called something else, depending on the type, such as:

• sinh tố = smoothie / blended fruit drink

So:

• Nước ép này hơi chua. = This juice is a little sour.
• Sinh tố này hơi chua. = This smoothie is a little sour.

So it is important not to confuse nước ép with sinh tố.