Povećali smo prihod.

Because Serbian often drops subject pronouns when they are already clear from the verb form.

In Povećali smo prihod, the combination -li smo already tells you the subject is we. So mi is unnecessary unless you want to add emphasis or contrast:

• Mi smo povećali prihod. = We increased the revenue.
  (emphasis on we, not someone else)

Without mi, the sentence sounds more natural and neutral.

Smo is the 1st person plural form of the auxiliary verb biti (to be) used to make the past tense.

So:

• smo = we are as a standalone verb form
• but in the past tense, it functions as an auxiliary: we have / we did

In this sentence:

• povećali = past participle
• smo = auxiliary

Together, povećali smo means we increased or we have increased, depending on context.

Povećali is the past active participle of the verb povećati (to increase).

It agrees with the subject in number and gender:

• povećao sam = I increased (masculine speaker)
• povećala sam = I increased (feminine speaker)
• povećali smo = we increased (masculine plural or mixed group)
• povećale smo = we increased (all-female group)

So in your sentence, povećali smo suggests the speakers are either:

• a group of men, or
• a mixed-gender group, or
• gender is being treated in the default masculine plural way

Yes. If the speakers were all female, the correct form would be:

• Povećale smo prihod.

That is because the participle must agree with the gender of the subject.

So:

• povećali smo = masculine/mixed we
• povećale smo = feminine we

This is because smo is a clitic, and Serbian clitics usually go in the second position of the sentence or clause.

So in a neutral sentence like this:

• Povećali smo prihod.

the first unit is Povećali, and smo comes right after it.

You can also change the word order for emphasis, but smo still tries to stay in second position:

• Mi smo povećali prihod.
• Prihod smo povećali.

All of these are possible, but the neutral version is Povećali smo prihod.

Prihod is in the accusative singular, because it is the direct object of the verb povećati.

You are increasing what?
→ prihod

For masculine inanimate nouns like prihod, the accusative singular looks the same as the nominative singular:

• nominative: prihod
• accusative: prihod

So even though the form does not change, its role in the sentence is accusative.

Because prihod is a masculine inanimate noun, and in Serbian those nouns usually have:

• nominative singular = accusative singular

So:

• prihod can mean revenue as the subject
• prihod can also mean revenue as the direct object

The case is determined by the sentence function, not by a different ending in this example.

It usually means income or revenue, depending on context.

Important distinction:

• prihod = income / revenue
• profit = dobit

So if this is a business context, Povećali smo prihod is often best understood as:

• We increased revenue.

If the context is personal finances or accounting more generally, it might be:

• We increased income.

The verb is povećati, which is perfective.

That means it presents the action as a completed whole or as achieving a result:

• povećati = to increase, to make bigger, to raise
  (focus on the result)

Its imperfective partner is usually povećavati:

• povećavati = to be increasing / to increase repeatedly or over time

So:

• Povećali smo prihod. = We increased the revenue.
  (completed action, result achieved)

Compare:

• Povećavali smo prihod. = We were increasing the revenue / We used to increase the revenue.

Yes. Serbian perfect tense often covers both meanings.

• Povećali smo prihod.

Depending on context, it can mean:

• We increased revenue.
• We have increased revenue.

English makes a stronger distinction between simple past and present perfect. Serbian often does not, so context decides which English translation sounds best.

Yes, absolutely.

• Povećali smo prihod. = neutral, natural
• Mi smo povećali prihod. = we increased the revenue
  (emphasis on we)

Adding mi is not wrong; it just makes the subject more explicit, often for contrast.

For example:

• Oni nisu povećali prihod, mi smo povećali prihod.
  They didn’t increase revenue; we did.

Yes. Serbian word order is fairly flexible, though not random. Different orders change the focus or emphasis.

Examples:

• Povećali smo prihod.
  Neutral statement.

• Prihod smo povećali.
  Emphasizes revenue.

• Mi smo povećali prihod.
  Emphasizes we.

The clitic smo still tends to stay in second position, which is one of the main constraints on word order.

Yes, but it would mean something different.

• prihod = revenue / income in a general or collective sense
• prihode = revenues / income streams / multiple items of income

So:

• Povećali smo prihod. = We increased revenue.
• Povećali smo prihode. = We increased revenues / income streams.

In business language, the singular prihod is very common when speaking generally.

A rough pronunciation guide:

• Povećali smo prihod
  ≈ po-VE-cha-lee smo PRI-hod

The letter ć is a soft sound, somewhat like the ty in some pronunciations of tune, but shorter and more compact. It is softer than č.

Also:

• h in prihod is pronounced, unlike in English honest
• r is rolled or tapped
• stress is not marked in normal writing, so learners usually pick it up through listening

In standard Serbian, no — you should keep smo.

The normal past tense needs both parts:

• povećali
  • smo

So the correct sentence is:

• Povećali smo prihod.

You may hear omissions in very informal speech, headlines, or certain dialectal styles, but for normal standard usage, smo should be there.