Ο τροχός αγγειοπλαστικής είναι στο εργαστήριο κεραμικής.

Ο is the masculine singular nominative form of the Greek definite article, meaning the.

It is used here because τροχός is:

• masculine
• singular
• the subject of the sentence

So Ο τροχός means the wheel.

Τροχός is the nominative singular form, which is the form used for the subject of a sentence.

In this sentence, the wheel is the thing being talked about, so Greek uses the nominative:

• Ο τροχός = the wheel

If the word had another role in the sentence, its form might change.

Αγγειοπλαστικής is in the genitive singular form.

Here the genitive is used to show a relationship like:

• wheel of pottery
• pottery wheel

So τροχός αγγειοπλαστικής means something like wheel for pottery / potter’s wheel.

This is very common in Greek: one noun is followed by another noun in the genitive to describe what kind of thing it is.

Greek often uses the genitive where English uses:

• of
• a noun used like an adjective
• a compound noun

So instead of building the phrase exactly like English pottery wheel, Greek says something closer to wheel of pottery-making.

That is why αγγειοπλαστικής ends in a genitive form.

Είναι means is.

Greek usually does not need an explicit subject pronoun like it, he, or she when the subject is already clear.

Here the subject is already given as Ο τροχός αγγειοπλαστικής, so Greek simply says:

• Ο τροχός αγγειοπλαστικής είναι...
• The pottery wheel is...

Στο is the contracted form of:

• σε = in / at / to
• το = the for a neuter singular noun

So:

• σε το εργαστήριο becomes στο εργαστήριο

This contraction is normal and very common in modern Greek.

Εργαστήριο is a neuter singular noun meaning workshop, lab, or studio.

After σε (here contracted in στο), Greek uses the accusative case.
For this noun, the accusative singular looks the same as the nominative singular:

• nominative: το εργαστήριο
• accusative: το εργαστήριο

So even though the case has changed, the word itself does not look different here.

For the same basic reason as αγγειοπλαστικής.

Κεραμικής describes what kind of workshop it is:

• εργαστήριο κεραμικής = ceramics workshop
• more literally, workshop of ceramics

Greek often uses a genitive noun after another noun to show the field, type, or specialty.

In Greek, when a genitive noun is used to classify or describe another noun, it often appears without its own article.

So:

• τροχός αγγειοπλαστικής
• εργαστήριο κεραμικής

sound natural as category-type expressions, similar to English compound nouns like pottery wheel or ceramics workshop.

Adding an article is sometimes possible in other contexts, but here the article is not needed.

They are related, but not always identical in nuance.

• αγγειοπλαστική often refers more specifically to pottery-making or the craft of shaping clay vessels
• κεραμική often means ceramics more generally

In this sentence:

• τροχός αγγειοπλαστικής is a natural way to say pottery wheel
• εργαστήριο κεραμικής is a natural way to say ceramics workshop

So the two words are close in meaning, but they are being used in slightly different, natural set phrases.

Yes. Greek word order is more flexible than English because the endings help show each word’s role.

This sentence could be reordered for emphasis, for example:

• Στο εργαστήριο κεραμικής είναι ο τροχός αγγειοπλαστικής.

But the original order is very natural and neutral:

• Ο τροχός αγγειοπλαστικής είναι στο εργαστήριο κεραμικής.

That order simply presents:

1. the subject
2. the verb
3. the location

A simple pronunciation guide is:

O tro-HOS an-yi-o-plas-TEE-kis EE-ne sto er-ga-STI-rio ke-ra-MI-kis

A few helpful notes:

• γγ in αγγειοπλαστικής sounds like ng or ngy
• ει in είναι sounds like ee
• the stress matters a lot in Greek, so pay attention to:
  • τροχός
  • αγγειοπλαστικής
  • εργαστήριο
  • κεραμικής