A fizikai munka nehéz.

A is the Hungarian definite article, equivalent to the.

Hungarian often uses the definite article in general statements where English uses no article. So:

A fizikai munka nehéz.
can naturally mean
Physical work is hard.

So the article does not always make the sentence sound specifically the way it would in English. Context decides whether it is generic or specific.

In Hungarian, the verb to be is usually omitted in the present tense, third person when the predicate is a noun or adjective.

So:

A fizikai munka nehéz.
literally looks like
The physical work hard.

But it means
The physical work is hard / Physical work is hard.

You do use the verb in other situations, for example:

• Én fáradt vagyok. = I am tired.
• A munka nehéz volt. = The work was hard.
• A munka nehéz lesz. = The work will be hard.

Because fizikai is an adjective directly describing the noun munka, so it goes before the noun:

fizikai munka = physical work

But nehéz is not inside the noun phrase. It is the predicate adjective, the part that says something about the subject:

A fizikai munka nehéz.
= Physical work is hard.

So the structure is:

• A fizikai munka = the subject
• nehéz = what is being said about the subject

It usually means physical work, manual work, or physical labor.

In Hungarian, this phrase often contrasts with:

• szellemi munka = mental/intellectual work

So fizikai munka usually refers to work that involves bodily effort, not office or intellectual work.

Here nehéz is in its basic singular form because the subject is singular: munka.

Hungarian adjectives do not change for gender, because Hungarian has no grammatical gender.

So there is no masculine/feminine change like in some other languages. In this sentence, the plain form nehéz is enough.

If the subject were plural, the predicate adjective would usually be plural too:

A munkák nehezek.
= The jobs/tasks are hard.

Yes. That is also correct.

Hungarian word order is more flexible than English, and changing the order often changes the focus or emphasis rather than the basic meaning.

• A fizikai munka nehéz. = neutral statement
• Nehéz a fizikai munka. = puts more emphasis on hard

Both can mean Physical work is hard, but the second one highlights the idea of difficulty more strongly.

It can mean several related things, depending on context:

• work
• labor
• job
• task

In this sentence, munka is best understood as work/labor in a general sense, not a job position.

So here physical work or physical labor is the most natural interpretation.

You add nem before the predicate:

A fizikai munka nem nehéz.
= Physical work is not hard.

In a simple neutral sentence, nem usually goes right before the part being negated. Here it negates nehéz.