Η ρίζα είναι κάπως μεγάλη.

A word-by-word breakdown:

• Η = the feminine singular definite article, meaning the
• ρίζα = root
• είναι = is
• κάπως = somewhat / rather / kind of
• μεγάλη = big / large, in the feminine singular form

So grammatically, it is:

• Η ρίζα = the subject, the root
• είναι = the verb, is
• κάπως μεγάλη = the description, somewhat large

Η is the definite article for a feminine singular noun in the nominative case.

Since ρίζα is a feminine singular noun, Greek uses:

• η ρίζα = the root

This is similar to how English uses the, but in Greek the article changes depending on gender, number, and case.

For comparison:

• ο = masculine singular
• η = feminine singular
• το = neuter singular

In Greek, every noun has a grammatical gender: masculine, feminine, or neuter.

ρίζα is a feminine noun. You can see that in this sentence because it takes:

• the feminine article η
• the feminine adjective form μεγάλη

Many Greek nouns ending in -α are feminine, though not all nouns can be guessed perfectly just from the ending. In practice, it is best to learn nouns together with their article:

• η ρίζα rather than just ρίζα

That way you automatically learn the noun’s gender.

Because adjectives in Greek must agree with the noun they describe in:

• gender
• number
• case

Since ρίζα is:

• feminine
• singular
• nominative

the adjective must also be feminine singular nominative:

• μεγάλη

Compare:

• ο άντρας είναι μεγάλος = the man is big
• η ρίζα είναι μεγάλη = the root is big
• το δέντρο είναι μεγάλο = the tree is big

So μεγάλη is simply the correct agreeing form for ρίζα.

κάπως usually means something like:

• somewhat
• rather
• kind of
• fairly, depending on context

In this sentence, it softens μεγάλη. So instead of saying the root is definitely large in a strong way, it suggests a milder idea:

• somewhat large
• rather large
• kind of big

It is a useful word when you want to sound less absolute.

Yes, it is natural. κάπως often works as an adverb modifying an adjective.

So:

• κάπως μεγάλη = somewhat/rather big

Depending on context, Greek speakers might also use other adverbs such as:

• αρκετά μεγάλη = quite/fairly big
• λίγο μεγάλη = a little big
• πολύ μεγάλη = very big

But κάπως μεγάλη is perfectly normal if the idea is moderately big or sort of big.

In standard Greek, the verb είναι is normally used in sentences like this.

So:

• Η ρίζα είναι μεγάλη = correct standard Greek

Unlike some languages, Greek does not usually drop the present-tense to be in ordinary neutral sentences.

So you should keep είναι here.

Yes, Greek word order is more flexible than English, although the neutral order here is very natural:

• Η ρίζα είναι κάπως μεγάλη

You may also see variations for emphasis, such as:

• Κάπως μεγάλη είναι η ρίζα
• Μεγάλη είναι η ρίζα

These alternatives can sound more marked or emphasize a different part of the sentence. For a learner, the original order is the safest and most neutral.

A helpful pronunciation guide is:

• ee REE-za EE-ne KAH-pos me-GHA-lee

A few notes:

• η sounds like ee
• ρ is a rolled or tapped r
• ζ sounds like z
• είναι is pronounced roughly EE-ne
• γ before α in μεγάλη is a softer Greek sound, not exactly the English g in go, but many learners start with an approximate gh sound

The stressed syllables are marked by the written accents:

• ρίζα → stress on ρί
• είναι → stress on εί
• κάπως → stress on κά
• μεγάλη → stress on γά

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

So:

• ρίζα → REE-za
• είναι → EE-ne
• κάπως → KAH-pos
• μεγάλη → me-GHA-lee

In Modern Greek, written accents are very important because they tell you where the stress goes. Stress can sometimes distinguish words or help you pronounce unfamiliar words correctly.

In this sentence, μεγάλη is a predicate adjective. That means it comes after είναι and describes the subject:

• Η ρίζα = subject
• είναι μεγάλη = is big

This is different from putting the adjective directly next to the noun:

• η μεγάλη ρίζα = the big root

So:

• η μεγάλη ρίζα = adjective used directly with the noun
• η ρίζα είναι μεγάλη = adjective used after is

Both are common, but they are different sentence structures.

Because ρίζα is the subject of the sentence, and subjects normally appear in the nominative case in Greek.

Here the sentence is saying something about the root, so η ρίζα is nominative.

Likewise, the adjective μεγάλη agrees with it in nominative feminine singular.

For a beginner, a useful shortcut is:

• after the article η in a basic subject position, a feminine singular noun is often nominative
• the adjective matching it will also usually be nominative

Not usually. Although κάπως can sometimes look like somehow, in this sentence that would sound odd in English.

Here κάπως means to some extent or rather, not in some way.

So better English equivalents would be:

• The root is somewhat large
• The root is rather big
• The root is kind of large

So this is a good example of why you should translate κάπως by meaning, not by a fixed English word every time.