Monitor je součástí zařízení.

Because after je (is), Czech often uses the instrumental case for the noun that describes what something is.

So:

• součást = nominative singular
• součástí = instrumental singular

In this sentence, je součástí means is part of.

This is a very common Czech pattern:

• To je problém. = That is a problem.
• To je problémem. = That is becoming / functioning as a problem, or a more formal stylistic variant.

With součást, the instrumental form součástí is especially common and natural in the meaning to be a part/component of something.

It actually is in the correct case already: genitive singular.

The noun součást usually goes with genitive, because in English we say part of something. In Czech, that of something relationship is commonly shown by the genitive case:

• součást zařízení = part of the device
• součást systému = part of the system
• součást auta = part of the car

The tricky part is that zařízení looks the same in several cases. Its nominative singular and genitive singular are both zařízení.

So the form does not visibly change, but grammatically it is genitive here.

Monitor is in the nominative singular, because it is the subject of the sentence.

It is the thing being talked about:

• Monitor = the monitor
• je = is
• součástí zařízení = part of the device

So the basic structure is:

subject + verb + complement + genitive phrase

Because Czech has no articles.

English distinguishes:

• a monitor
• the monitor

Czech simply says:

• monitor

So Monitor je součástí zařízení could mean:

• The monitor is part of the device
• A monitor is part of the device

The exact meaning depends on context.

Here, zařízení means device or equipment.

It is a very flexible word in Czech, and depending on context it can also mean things like:

• a machine/device
• equipment
• an installation
• a facility
• an arrangement/setup

In this sentence, the most natural meaning is device.

Because součást usually means a component / constituent part of a whole, while část is a broader word meaning simply part or portion.

Compare:

• součást zařízení = a component/part of a device
• část knihy = part of a book
• část města = part of a city

So součást sounds more appropriate when talking about something that belongs structurally or functionally to a larger object or system.

Yes. Czech word order is more flexible than English word order.

The neutral version is:

• Monitor je součástí zařízení.

But you could also say:

• Součástí zařízení je monitor.

This version emphasizes monitor a bit differently, often answering a question like What is part of the device?

So both are grammatical, but the emphasis changes.

No. It is capitalized only because it is the first word of the sentence.

In Czech, common nouns are normally not capitalized unless they start a sentence.

So inside a sentence you would write:

• monitor je nový
• vidím monitor

not Monitor, unless it is at the beginning.

Roughly:

MON-ih-tor yeh SOO-chaas-tyi zah-RZHEE-zeh-nyee

A few useful pronunciation notes:

• Czech stress is usually on the first syllable of each word:

  • MOnitor
  • JE
  • SOUčástí
  • ZAřízení
• ou in součástí sounds somewhat like oh-oo said quickly.
• č sounds like ch in church.
• ř in zařízení is a special Czech sound, somewhat like a mix of r and zh. Learners usually need time to master it.
• í is a long vowel.

You may encounter that, but Monitor je součástí zařízení is the safer and more standard form to learn.

Why?

• součástí = instrumental, a very common pattern after být
• součást zařízení = still understandable, but less standard in this kind of sentence

So for a learner, it is best to remember:

• X je součástí Y = X is part of Y

That pattern will serve you well in most situations.