Laki suojelee työntekijää.

In Laki suojelee työntekijää:

• laki = the subject
• suojelee = the verb
• työntekijää = the object

A useful clue is the case ending. Laki is in the basic dictionary form here, which is normal for a singular subject. Työntekijää has an ending that shows it is not the subject.

Because työntekijää is in the partitive singular.

The basic form is työntekijä.
The partitive singular is työntekijää.

Finnish changes noun endings to show grammatical role and meaning. In this sentence, the object is marked with the partitive, so työntekijä becomes työntekijää.

Because with the verb suojella in this kind of meaning, Finnish normally uses a partitive object.

A simple way to think about it is this: the sentence describes protecting as an ongoing state or general action, not a completed action with a clear endpoint. Finnish often uses the partitive for that kind of object.

So:

• suojelee työntekijää = protects the employee / protects an employee

This is very natural Finnish. A total object here would not be the normal choice.

Suojelee is the 3rd person singular present tense of suojella.

So:

• suojella = to protect
• suojelee = he/she/it protects, or more generally protects

Since laki is singular, the verb is also singular:

• laki suojelee = the law protects

This present tense can also express a general truth, not only something happening right now.

Because Finnish has no articles.

English needs words like the and a/an, but Finnish usually does not. The meaning comes from context.

So laki can mean:

• the law
• a law
• sometimes even law in a general sense

And työntekijää can mean:

• the employee
• an employee

The exact interpretation depends on context.

Yes. Finnish word order is more flexible than English because case endings do a lot of the grammatical work.

The most neutral order here is:

• Laki suojelee työntekijää.

But you could also see:

• Työntekijää suojelee laki.

That still means basically the same thing, but the emphasis changes. The second version puts more focus on työntekijää.

So Finnish uses word order not only for grammar, but also for information structure and emphasis.

It is singular.

• laki = singular
• suojelee = singular verb form
• työntekijää = singular partitive

If you wanted plural, you might say:

• Lait suojelevat työntekijöitä.
  = Laws protect employees.

So compare:

• laki → lait
• suojelee → suojelevat
• työntekijää → työntekijöitä

Yes, työntekijä is basically a compound word.

It comes from:

• työ = work
• tekijä = doer / maker / person who does

So työntekijä is literally something like work-doer, which gives the meaning worker or employee.

The first part appears as työn-, which is a common compound form related to työ. Finnish compounds often change the first part a little.

A few key points:

• y is a front rounded vowel, like German ü or French u
• ö is like German ö or French eu in some words
• ä is like the vowel in English cat, but cleaner and tenser
• aa means the vowel is long
• Finnish stress is usually on the first syllable

So työntekijää has first-syllable stress, and the final ää is held longer than a single ä.

Also, in Finnish, double vowels really matter.
So ä and ää are different lengths, and that difference is important.

Not necessarily.

Because Finnish has no articles, työntekijää could refer to:

• an employee in general
• the employee, if context makes that clear
• employees as a type, in a general statement about what the law does

So this sentence can naturally be understood as a general statement, something like a principle: the law protects the employee / protects employees / protects a worker.

The exact English translation depends on context, but the Finnish sentence itself is perfectly normal without making that distinction explicit.