Una vegada és prou.

Here una vegada means one time or once.

So Una vegada és prou literally breaks down as:

• una vegada = one time / once
• és = is
• prou = enough

A native English speaker might expect once to be a single word, but in Catalan it is often expressed with una vegada or un cop.

Because vegada is a feminine noun in Catalan.

That means it takes the feminine form of the indefinite article:

• una vegada = one time
• not un vegada

You can see the same pattern in other feminine nouns:

• una casa = a house
• una paraula = a word

Prou means enough or sufficient.

In this sentence, it means that one time is sufficient.

You will see prou in several very common Catalan expressions:

• Ja n'hi ha prou = That's enough / Enough already
• No és prou = It's not enough
• Prou! = Enough! / Stop!

So in Una vegada és prou, prou is the idea of being enough.

És is the third-person singular present of ser = to be.

The subject here is una vegada, which is singular, so Catalan uses és:

• Una vegada és prou = One time is enough

It works like English is in Once is enough.

It is understandable, but many speakers would more naturally say:

• Amb una vegada n'hi ha prou
• Una vegada ja n'hi ha prou
• Un cop n'hi ha prou

These are especially common in everyday spoken Catalan.

So Una vegada és prou is short and clear, but in conversation a learner will probably hear n'hi ha prou very often when Catalan speakers mean is enough.

N'hi ha prou is a very common Catalan expression meaning it is enough, there is enough, or that will do.

For example:

• Amb això n'hi ha prou = That's enough with that / That will do
• Una vegada n'hi ha prou = Once is enough

Compared with és prou, n'hi ha prou often sounds more idiomatic in everyday speech.

So if you want the most common spoken version of the idea, Amb una vegada n'hi ha prou is an excellent choice.

Yes. Depending on context, una vegada can mean:

• once / one time
• once, when in a more formal style
• part of the storytelling opener Una vegada hi havia... = Once upon a time...

So the phrase has more than one use. In Una vegada és prou, though, it clearly means one time.

Both can mean once or one time.

For example:

• Una vegada és prou
• Un cop és prou
• Amb un cop n'hi ha prou

In many contexts, un cop sounds a bit more common or natural in speech, depending on the region and speaker. Una vegada is also perfectly standard and very easy to understand.

A useful pattern is:

• una vegada = one time
• dues vegades = twice / two times
• tres vegades = three times

No. Vegada means occurrence, instance, or time in the sense of number of times.

So:

• una vegada = one time / once
• dues vegades = two times / twice

But if you mean What time is it?, Catalan uses hora, not vegada:

• Quina hora és? = What time is it?

This is an important distinction for English speakers, since English uses time for both ideas.

A simple approximation is:

OO-na va-GA-da es PROW

A few notes:

• prou sounds roughly like prow in English
• és sounds like ess
• in some dialects, the vowels in una and vegada are reduced more than in others

If you hear Central Catalan, it may sound closer to:

OO-nə bə-GA-thə es PROW

But for a learner, OO-na va-GA-da es PROW is a good practical starting point.