В полдень я обычно делаю небольшой перерыв.

В полдень is the standard Russian way to say at noon.

Here, в is used with a time expression to mean at a certain time:

• в час = at one o’clock
• в два часа = at two o’clock
• в полдень = at noon

The noun полдень means noon / midday. In this expression, it appears in the accusative form, but for this word the accusative looks the same as the dictionary form: полдень.

So you should learn в полдень as a fixed, common time expression.

It is in the accusative case, because after в meaning at a specific time, Russian often uses the accusative.

Compare:

• в понедельник = on Monday
• в час = at one o’clock
• в полдень = at noon

For полдень, the accusative singular is the same as the nominative singular, so you do not see a form change:

• nominative: полдень
• accusative: полдень

Yes, it can often be omitted in Russian.

Russian verb endings usually show who the subject is:

• делаю already means I do / I am doing

So both are possible:

• Я обычно делаю небольшой перерыв.
• Обычно делаю небольшой перерыв.

Including я can make the subject clearer, add emphasis, or simply sound more natural in context. Russian often drops subject pronouns when they are obvious, but keeping them is also very common.

Because делаю is the imperfective verb, and it fits the meaning of a habitual / repeated action.

The sentence means something like:

• I usually take a short break at noon

This is something the speaker does regularly, so Russian uses the imperfective:

• делать = to do, to make; often used for repeated or ongoing actions
• сделать = to do, to make; usually a completed one-time action

So:

• обычно делаю = I usually do / I usually take
• обычно сделаю would sound wrong here, because сделать does not fit well with a repeated routine in this context

Russian commonly says делать перерыв, literally to make/do a break, where English says take a break.

This is a normal collocation in Russian. Languages often pair nouns with different verbs:

• English: take a break
• Russian: делать перерыв

You may also hear:

• устроить перерыв = to arrange / have a break
• сделать перерыв = to take a break, often focusing on the act of making a pause
• прерваться = to pause / interrupt oneself

But делать перерыв is natural and easy to understand.

Небольшой is an adjective meaning small / short / not big.

It describes перерыв, which is a masculine singular inanimate noun. Because перерыв is the direct object after делаю, it is in the accusative case. For masculine inanimate nouns, the accusative usually looks like the nominative, and the adjective matches it.

So:

• nominative: небольшой перерыв
• accusative: небольшой перерыв

That is why you see небольшой here.

Both are possible, but небольшой перерыв sounds more natural here.

In Russian:

• маленький often means physically small, little, tiny
• небольшой often means modest, short, not large in amount or duration

A break is not really a physical object, so небольшой перерыв is a more idiomatic way to say a short/small break.

Compare:

• небольшой перерыв = a short break
• маленький стол = a small table

Перерыв is in the accusative case, because it is the direct object of делаю.

The speaker is doing / taking what?

• перерыв

Since перерыв is masculine and inanimate, its accusative singular is the same as its nominative singular:

• nominative: перерыв
• accusative: перерыв

So the form does not change.

Yes, the word order can change.

Обычно means usually, and Russian word order is more flexible than English word order. The sentence:

• В полдень я обычно делаю небольшой перерыв.

is natural and means:

• At noon, I usually take a short break.

Other possible orders:

• Я обычно в полдень делаю небольшой перерыв.
• Обычно я в полдень делаю небольшой перерыв.
• Я в полдень обычно делаю небольшой перерыв.

These all mean roughly the same thing, but the emphasis changes slightly. Putting в полдень first highlights the time.

It means at noon or at midday, not in the afternoon.

• полдень = noon, midday
• день = day / daytime
• после полудня = afternoon, literally after noon

So в полдень refers specifically to the time around 12:00.

Yes, sometimes, but usually is the most direct translation here.

Обычно often means:

• usually
• normally
• as a rule

In this sentence, usually sounds best because it describes a habit:

• At noon I usually take a short break.

If you say normally, the meaning is still understandable, but in English it can sometimes suggest under normal circumstances, which is slightly different.

Russian has no articles, so there is no equivalent of English a or the.

That means:

• перерыв can mean a break or the break, depending on context

In this sentence, English naturally uses a short break, but Russian simply says:

• небольшой перерыв

You must understand definiteness from the situation, not from an article.

You would simply remove обычно:

• В полдень я делаю небольшой перерыв.

That means:

• At noon I take a short break.

Without обычно, it sounds more like a simple statement of fact. With обычно, it clearly describes a regular habit.

It is neutral and natural standard Russian.

Nothing in it is especially formal or slangy:

• в полдень = standard
• обычно = standard
• делаю небольшой перерыв = normal everyday language

It would sound fine in conversation, writing, or simple explanation. If someone were speaking very casually, they might also say things like:

• В полдень я обычно делаю маленький перерыв.
• В полдень я обычно делаю паузу.

But the original sentence is completely natural.

The stress is on the first syllable:

• по́лдень

A rough guide for English speakers:

• POHL-den’

Notes:

• по́л- is stressed
• the final -ень has a soft н
• the ь does not make its own sound; it softens the consonant before it

So try to say it as POHL-dyen’, with a soft final n sound.