Το ποτιστήρι είναι δίπλα στη γλάστρα.

Ποτιστήρι is neuter, which is why it takes το.

Γλάστρα is feminine, and you can see that in στη, which contains the feminine article.

A useful beginner pattern is:

• το
  • noun often signals neuter
• η / τη
  • noun often signals feminine

Also, the endings help:

• -ι is very often neuter
• -α is very often feminine

So in this sentence:

• το ποτιστήρι = neuter
• στη γλάστρα = feminine

Because ποτιστήρι is the subject of the sentence, and Greek normally uses the definite article with specific nouns much more regularly than English does.

Here, το is the nominative singular neuter article, matching ποτιστήρι.

So:

• το ποτιστήρι = the watering can

The article has to agree with the noun in gender, number, and case.

Είναι is the present-tense form of είμαι (to be).

In this sentence, it means is.

Greek usually does not need an explicit subject pronoun like it, because the subject is already clear from the noun phrase:

• Το ποτιστήρι = the subject
• είναι = is

So Greek says:

• Το ποτιστήρι είναι...

not usually something like Αυτό είναι... unless you specifically want emphasis.

Δίπλα means next to / beside.

In Greek, it is very commonly used with σε plus a noun:

• δίπλα σε κάτι = next to something

In your sentence, that σε has combined with the article, giving:

• δίπλα στη γλάστρα

So you can think of the structure as:

• δίπλα σε τη γλάστρα → δίπλα στη γλάστρα

In normal modern Greek, the contracted form is what you will usually hear and read.

It is hidden inside στη.

Στη is the contracted form of:

• σε + τη

So:

• στη γλάστρα literally contains both the preposition σε and the feminine article τη

This is very common in Greek:

• σε + το → στο
• σε + τη → στη
• σε + τον → στον

So there really is an article before γλάστρα; it is just fused with the preposition.

After σε, Greek uses the accusative case.

So grammatically, γλάστρα here is in the accusative. But many feminine nouns in -α look the same in the nominative and accusative singular.

That means:

• η γλάστρα = nominative
• τη γλάστρα = accusative

The noun itself stays the same, and the article shows the case difference.

So even though the form γλάστρα does not visibly change, it is still functioning as an accusative noun here.

Yes, you may see or hear στην γλάστρα as well.

For learners, the simplest rule is:

• στη is the usual form before a consonant
• στην is required before a vowel and also used by some speakers more generally

Since γλάστρα starts with a consonant, στη γλάστρα is completely natural and very common.

So for this sentence, στη γλάστρα is the safest everyday choice.

No. Greek word order is more flexible than English word order.

The sentence:

• Το ποτιστήρι είναι δίπλα στη γλάστρα.

is the most neutral, straightforward order:

• subject
• verb
• location

But Greek can move things around for emphasis. For example:

• Δίπλα στη γλάστρα είναι το ποτιστήρι.

This still makes sense, but now the location is more prominent.

For a beginner, the original order is the best one to learn first.

A rough pronunciation is:

to poti-STEE-ri EE-ne THEE-pla sti GHLA-stra

A few useful sound notes:

• είναι sounds roughly like EE-ne
• δ in δίπλα sounds like th in this
• γ in γλάστρα is not a hard English g; it is a softer Greek sound
• the stress falls on:
  • ποτιστήρι → -στή-
  • είναι → εί-
  • δίπλα → δί-
  • γλάστρα → γλά-

So if you want a smooth beginner reading, say:

to poti-STEE-ri EE-ne THEE-pla sti GHLA-stra

Greek accent marks show which syllable is stressed, but monosyllabic words usually do not need a written accent.

So:

• ποτιστήρι
• είναι
• δίπλα
• γλάστρα

all have more than one syllable, so they show stress with an accent mark.

But:

• το
• στη

have only one syllable, so they normally do not take an accent mark.

This is why the sentence has accents on the longer words, but not on those short function words.