Раунд короткий.

In Ukrainian, the verb to be is usually left out in the present tense.

So:

• Раунд короткий = The round is short
• literally: Round short

This is completely normal Ukrainian sentence structure.
If you are talking about the present, you usually do not say a separate word for is / am / are.

Because раунд is a masculine singular noun, and the adjective has to match it.

In Ukrainian, adjectives agree with the noun in:

• gender
• number
• case

Here:

• раунд = masculine, singular, nominative
• so the adjective must also be masculine, singular, nominative
• that gives короткий

Compare:

• короткий раунд — a short round
• коротка пауза — a short pause
• коротке відео — a short video

So the -ий ending here shows the masculine singular form.

Both words are in the nominative singular.

Why?

Because this is a basic sentence of the type:

• X is Y

In Ukrainian, in a simple present-tense sentence like this, the subject is in the nominative, and the predicate adjective is also typically in the nominative.

So:

• раунд — nominative singular
• короткий — nominative singular masculine adjective

Yes, but it means something slightly different in structure.

• Раунд короткий = The round is short
  This is a full sentence.

• Короткий раунд = a short round / short round
  This is a noun phrase, not usually a full sentence by itself.

So the difference is:

• noun + adjective here works as a sentence
• adjective + noun usually works as a descriptive phrase

That said, word order in Ukrainian is flexible, and context matters. But for a beginner, this is a very useful distinction.

Ukrainian has no articles.

English distinguishes:

• a round
• the round

Ukrainian just says:

• раунд

The exact meaning depends on context.

So Раунд короткий could mean:

• The round is short
• A round is short
• This round is short

Usually the situation tells you which one is meant.

It can mean both, depending on context.

Короткий can describe:

• something physically short
• something brief in time
• something concise

So with раунд, it most naturally means the round is short in duration.

Examples:

• короткий шнур — a short cord
• коротка розмова — a short conversation
• короткий раунд — a short round

So yes, it can mean brief, not just physically short.

A simple learner-friendly approximation is:

• Раунд ≈ round
• короткий ≈ ko-ROT-kyy

A few notes:

• Раунд is a loanword and sounds quite close to English round
• the stress in короткий is on the middle syllable: коро́ткий
• the final -ий is not exactly English ee; it is a Ukrainian ending, but kyy is a helpful approximation for learners

So you can think of it as:

• round ko-ROT-kyy

No, it is a loanword, ultimately from English.

Ukrainian uses many international words, especially in sports, games, boxing, competitions, and similar contexts. Раунд is one of them.

So for an English speaker, this word is relatively easy to recognize.

Grammatically, є exists in Ukrainian, but in a simple sentence like this it is usually not used.

Natural Ukrainian is:

• Раунд короткий

Using є here would usually sound unnecessary or unnatural in ordinary speech.

For beginners, the best rule is:

• in present-tense sentences like X is Y, just omit is

So stick with:

• Раунд короткий

Adjectives usually do come before nouns when they directly describe them:

• короткий раунд — a short round

But when the adjective is part of the predicate of the sentence, it can come after the noun:

• Раунд короткий — The round is short

So here the adjective is not just modifying the noun inside a noun phrase; it is telling you something about the subject.

A useful beginner pattern is:

• adjective + noun = descriptive phrase
• noun + adjective = often a full sentence meaning noun is adjective

That is exactly what is happening here.