On mrzi ovaj posao.

• On = he
• mrzi = hates
• ovaj = this
• posao = job / work

So the sentence means He hates this job.

Yes. Serbian often drops subject pronouns when the subject is clear from the verb form or context.

So both of these are possible:

• On mrzi ovaj posao.
• Mrzi ovaj posao.

The version with on sounds more explicit. It can help:

• clarify who is being talked about
• add emphasis, like He hates this job

Without on, the sentence can still mean he hates this job, but depending on context it could also mean she hates this job or it hates this job, since mrzi is the same for on / ona / ono.

The dictionary form is mrzeti, meaning to hate.

mrzi is the 3rd person singular present tense form:

• ja mrzim = I hate
• ti mrziš = you hate
• on/ona/ono mrzi = he/she/it hates

So in this sentence, mrzi matches on.

Yes, mrzeti is strong and usually really does mean to hate.

If you want something softer, Serbian often uses:

• ne voleti = to not like
• ne podnositi = to not stand / can’t stand

So:

• On mrzi ovaj posao. = He hates this job.
• On ne voli ovaj posao. = He doesn’t like this job.

The first is stronger and more emotional.

Because posao is a masculine singular noun.

The Serbian word for this changes to match the noun’s:

• gender
• number
• case

For singular nominative forms:

• ovaj = masculine
• ova = feminine
• ovo = neuter

Since posao is masculine, you use ovaj:

• ovaj posao = this job

Because posao is a masculine inanimate noun, and in Serbian the accusative singular of masculine inanimate nouns is usually the same as the nominative singular.

Here, ovaj posao is the direct object of mrzi, so it is in the accusative. But it looks the same as the nominative:

• nominative: ovaj posao
• accusative: ovaj posao

So even though it is the object, the form does not visibly change here.

We know from the sentence structure and the verb.

The verb mrzeti takes a direct object, so the thing being hated must be in the accusative.

In On mrzi ovaj posao:

• On is the subject
• mrzi is the verb
• ovaj posao is the direct object

Even though the form looks the same as nominative, its function in the sentence shows that it is accusative.

You can see the case more clearly with some other masculine nouns, especially animate ones, where accusative changes form.

Because Serbian does not have articles like English the and a/an.

So posao can mean:

• a job
• the job

The exact meaning comes from context.

Here, ovaj posao already means this job, so no article is needed.

Yes. Serbian word order is more flexible than English because case endings help show grammatical roles.

The neutral, straightforward order is:

• On mrzi ovaj posao.

But other orders are possible for emphasis, for example:

• Ovaj posao on mrzi. = It’s this job that he hates.
• Mrzi on ovaj posao. = possible, often more marked or expressive

Even though word order can change, the basic learner-friendly version is On mrzi ovaj posao.

The tricky part is the cluster mr- at the start. Serbian allows consonant clusters that may feel unusual to English speakers.

A rough pronunciation guide:

• mrzi ≈ mr-zee

The r is pronounced clearly, not swallowed. Try saying:

• a short m
• then a tapped/trilled r
• then zi

Also:

• z sounds like the z in zoo
• i sounds like ee in see

Yes. Posao is masculine.

In Serbian, many masculine nouns end in a consonant, but some masculine nouns can end in -o as well. So you cannot rely only on the final letter every time.

You can tell it is masculine here because it takes:

• ovaj and not ova or ovo

So:

• ovaj posao = this job

That agreement tells you the noun is masculine.

Sometimes, depending on context, but posao most often means:

• job
• work
• task
• business / matter

In this sentence, the most natural English translation is usually this job.

If Serbian specifically wants to talk about work in a more general sense, another common noun is rad. But posao is extremely common for a job or one’s work situation.

Yes, it is completely natural.

On mrzi ovaj posao is a normal, idiomatic way to say He hates this job.

In conversation, a Serbian speaker might also say:

• Mrzi ovaj posao. if the subject is already known
• On ne voli ovaj posao. if they want a milder meaning

But your sentence is standard and natural.