Lượng nước này đủ.

Lượng means amount or quantity.

So:

• lượng nước = amount of water
• Lượng nước này đủ. = This amount of water is enough.

In this sentence, lượng is being used to talk about how much water there is, not just water in general.

In Vietnamese, words like này (this), đó/kia (that) usually come after the noun.

So:

• lượng nước này = this amount of water
• literally: amount water this

This is normal Vietnamese word order.

Compare:

• cuốn sách này = this book
• người đó = that person
• ly nước này = this glass of water

Vietnamese often does not use a verb like to be in simple statements with adjectives.

So:

• Lượng nước này đủ.
• literally: This amount of water enough.

This is a complete and natural sentence in Vietnamese.

A few similar examples:

• Trời nóng. = The weather is hot.
• Cơm ngon. = The food is delicious.
• Nhà tôi xa. = My house is far.

Đủ means enough, sufficient, or adequate.

In this sentence, it works like an adjective/predicate:

• Lượng nước này đủ. = This amount of water is enough.

But đủ can also appear in other patterns, such as:

• đủ tiền = enough money
• đủ ăn = enough to eat
• đủ để... = enough to...

Examples:

• Tôi không đủ tiền. = I don’t have enough money.
• Thời gian đủ để làm việc này. = There is enough time to do this.

Not necessarily. In Vietnamese, just like in English, the goal or purpose can be left out if it is already understood from context.

So Lượng nước này đủ. can mean things like:

• This amount of water is enough.
• This much water is sufficient.

Depending on context, it might mean:

• enough for cooking
• enough for one day
• enough for the plants
• enough for everyone

If you want to make it explicit, you can add more:

• Lượng nước này đủ cho cả ngày. = This amount of water is enough for the whole day.
• Lượng nước này đủ để nấu ăn. = This amount of water is enough for cooking.

Yes, you can, but it changes the nuance.

• Lượng nước này đủ. focuses on the amount/quantity
• Nước này đủ. sounds more like this water is enough

In many situations, Vietnamese speakers may prefer a more natural phrase like:

• Chỗ nước này đủ rồi. = This amount of water is enough already.
• Nước thế này là đủ. = This much water is enough.

So nước này đủ is possible in some contexts, but lượng nước này đủ is clearer when you specifically want to emphasize the quantity.

Both can refer to quantity, but lượng nước is usually more natural here.

• lượng nước = amount of water
• số lượng nước = quantity of water

Số lượng is often more formal, technical, or statistical. It is common in reports, science, administration, or careful measurement.

So:

• Lượng nước này đủ. sounds normal and natural.
• Số lượng nước này đủ. is grammatical, but a bit more formal or stiff in everyday speech.

A rough pronunciation guide:

• Lượng ≈ loo-uhng with a heavy falling tone and a final ng
• nước ≈ noo-uhk with a dipping/broken tone
• này ≈ nye with a level tone
• đủ ≈ doo with a dipping/rising tone

A rough English-style approximation is:

loo-uhng noo-uhk nye doo

But Vietnamese tones matter a lot, so the approximation only helps a little.

A few pronunciation notes:

• ươ in lượng and nước does not exist exactly in English.
• đ is like normal English d
• đủ has the hỏi tone in Southern speech or a similar contour depending on dialectal realization; tone quality differs by region.

If you want, I can also break it down by Northern vs. Southern pronunciation.

Vietnamese generally follows this order:

noun phrase + demonstrative + adjective/predicate

So here:

• lượng nước = noun phrase
• này = this
• đủ = predicate adjective enough

That gives:

Lượng nước này đủ.

More generally:

• Cái bàn này lớn. = This table is big.
• Con chó đó đẹp. = That dog is beautiful.
• Ly cà phê này ngon. = This coffee is tasty.

Putting này before the noun would sound wrong in standard Vietnamese.

Very often, yes.

• Lượng nước này đủ rồi.

Adding rồi can make it sound more natural in conversation, especially when you are deciding whether more is needed.

It can suggest:

• This amount of water is enough now
• That’s enough water
• No more is needed

For example:

• Thêm nữa không?
• Không, lượng nước này đủ rồi.

So the sentence without rồi is fine, but with rồi it may sound more conversational in the right context.

Not exactly in the usual sense.

Vietnamese classifiers are words like:

• cái
• con
• cuốn
• ly
• chai

These are used with countable nouns.

But lượng is more of a quantity noun or measure-type noun meaning amount. It is used to talk about uncountable things like water, sugar, money, time, and so on.

So:

• một lượng nước = an amount of water
• lượng nước này = this amount of water

It is not a typical classifier like cái or con.

Usually not in this meaning.

You would not normally say:

• đủ lượng nước này

to mean this amount of water is enough.

The normal pattern is:

• lượng nước này đủ

If you want đủ before something, it usually appears in other structures, such as:

• đủ nước = enough water
• đủ thời gian = enough time
• đủ cho tôi = enough for me
• đủ để dùng = enough to use

So the position of đủ depends on the sentence pattern.

Common translations include:

• This amount of water is enough.
• This much water is enough.
• This quantity of water is sufficient.
• There is enough water here. — depending on context

The most natural English choice depends on the situation. If someone is pouring water, This much water is enough may sound best. If you are discussing a measured quantity, This amount of water is enough is a very good match.