Η καρφίτσα είναι μικρή.

Η means the.

More specifically, it is the feminine singular definite article in the nominative case. It is used because καρφίτσα is a feminine singular noun and it is the subject of the sentence.

So:

• η = the for a feminine singular noun
• καρφίτσα = the noun it goes with

In Greek, every noun has a grammatical gender: masculine, feminine, or neuter. Καρφίτσα happens to be a feminine noun.

This is a property of the word itself, not necessarily of the object in real life. English speakers often expect gender to reflect biological sex, but in Greek grammatical gender is just part of the noun’s grammar.

Because καρφίτσα is feminine, words connected to it also have to match it, such as:

• the article: η
• the adjective: μικρή

Greek adjectives must agree with the noun they describe in gender, number, and case.

Since καρφίτσα is:

• feminine
• singular
• nominative

the adjective must also be feminine singular nominative, so you get μικρή.

Compare:

• μικρός = masculine singular
• μικρή = feminine singular
• μικρό = neuter singular

So Η καρφίτσα είναι μικρή is grammatically matched all the way through.

Είναι is the Modern Greek form of the verb to be here, meaning is.

In this sentence, it links the subject Η καρφίτσα with the description μικρή.

So the structure is:

• Η καρφίτσα = subject
• είναι = is
• μικρή = adjective describing the subject

A useful thing to know is that είναι can also mean are in other contexts, because the same form is used for both he/she/it is and they are in Modern Greek.

Greek often does not use an explicit subject pronoun when it is unnecessary.

In English, you say It is small or The pin is small. In Greek, if the noun is already there, you normally do not add a separate word for it. The subject is already clear from Η καρφίτσα.

So Greek prefers:

• Η καρφίτσα είναι μικρή.

not something like:

• Η καρφίτσα αυτή είναι μικρή unless you specifically want emphasis like this pin is small

The main noun phrase Η καρφίτσα is in the nominative case, because it is the subject of the sentence.

The adjective μικρή is also in the nominative because it describes the subject after the verb είναι.

So:

• Η = feminine singular nominative article
• καρφίτσα = feminine singular nominative noun
• μικρή = feminine singular nominative adjective

This is very common after forms of to be in Greek.

Yes, Greek word order is more flexible than English word order.

The neutral, straightforward version is:

• Η καρφίτσα είναι μικρή.

But Greek can change word order for emphasis, for example:

• Μικρή είναι η καρφίτσα. = emphasis on small
• Είναι μικρή η καρφίτσα. = also possible, depending on context

Even when the order changes, the endings help show how the words relate to one another.

Still, for learners, the safest default is the standard pattern:

• subject + είναι + adjective

A simple pronunciation guide is:

ee kar-FEET-sa EE-ne mee-KREE

More carefully:

• Η = ee
• καρφίτσα = kar-FEET-sa
• είναι = EE-ne
• μικρή = mee-KREE

The written accent marks show where the stress goes:

• καρφίτσα
• είναι
• μικρή

The accent marks show which syllable is stressed when you pronounce the word.

In this sentence:

• καρφίτσα → stress on φί
• είναι → stress on εί
• μικρή → stress on ρή

This matters because stress is an important part of correct Greek pronunciation, and in some cases it can help distinguish forms.

Normally, no, not in a neutral sentence with the meaning The pin is small.

Greek usually uses the definite article where English uses the, so Η καρφίτσα is the natural phrase for the pin.

Leaving out the article would sound unusual here unless you were speaking in a special style, using notes/headlines, or producing a very marked sentence.

For normal speech, use:

• Η καρφίτσα είναι μικρή.

Not always exactly. Depending on context, καρφίτσα can refer to a pin, and in some contexts it may overlap with ideas like brooch or other pin-like objects.

So the exact English word can depend on what kind of object you mean. But grammatically, the sentence works the same way regardless of the exact translation.

Yes. It is one of the most basic and common patterns in Greek:

• article + noun + είναι + adjective

For example:

• Το σπίτι είναι μεγάλο. = The house is big.
• Η πόρτα είναι ανοιχτή. = The door is open.
• Το βιβλίο είναι παλιό. = The book is old.

So Η καρφίτσα είναι μικρή is a very useful model sentence for learning how Greek articles, nouns, the verb είναι, and adjectives work together.