Η μαρτυρία είναι ξεκάθαρη.

Η is the definite article for a feminine singular noun in the nominative case. In English, it usually corresponds to the.

So in Η μαρτυρία, Η means the, and it matches μαρτυρία, which is a feminine singular noun.

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

This is a grammatical feature, not necessarily something logical or natural. Because μαρτυρία is feminine, the article and adjective must also be feminine:

• Η μαρτυρία
• ξεκάθαρη

That agreement is very important in Greek.

Είναι means is or are, depending on context. It is the 3rd person singular/plural form of the verb είμαι (to be).

In this sentence, it means is:

• Η μαρτυρία είναι ξεκάθαρη.
• The testimony is clear.

Unlike in some languages, Greek normally does use the verb to be in this kind of sentence, just like English does.

Because it must agree with μαρτυρία.

Since μαρτυρία is:

• feminine
• singular
• nominative

the adjective also appears in the feminine singular nominative form:

• masculine: ξεκάθαρος
• feminine: ξεκάθαρη
• neuter: ξεκάθαρο

So the ending -η shows that the adjective matches the feminine noun.

It often means clear, but it can also carry the idea of very clear, obvious, or unambiguous, depending on context.

The word ξεκάθαρος / ξεκάθαρη / ξεκάθαρο is common in everyday Greek and often feels a bit stronger or more emphatic than a more neutral word for clear.

So in many contexts, Η μαρτυρία είναι ξεκάθαρη could suggest not just that the testimony is clear, but that it is plainly clear.

A simple pronunciation guide is:

ee mar-tee-REE-a EE-ne kse-KA-tha-ree

A few notes:

• Η is pronounced ee
• μαρτυρία has the stress on ρί
• είναι is pronounced roughly EE-ne
• ξεκάθαρη has the stress on κά

The letter combination ξ sounds like ks, as in books.

Modern Greek uses accent marks to show which syllable is stressed.

In this sentence:

• μαρτυρία → stress on ρί
• είναι → stress on εί
• ξεκάθαρη → stress on κά

These marks are important because stress matters in Greek pronunciation, and sometimes it can even distinguish words.

Normally, no—not in standard Greek if you mean the testimony in a neutral statement.

The natural standard form is:

• Η μαρτυρία είναι ξεκάθαρη.

Leaving out the article would usually sound unnatural here unless you were speaking in a very special context, such as headlines, note-taking, or highly compressed style.

Greek uses definite articles more regularly than English in many situations, so learners should get used to seeing them.

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

The neutral order here is:

• Η μαρτυρία είναι ξεκάθαρη.

But you may also hear:

• Ξεκάθαρη είναι η μαρτυρία.
• Είναι ξεκάθαρη η μαρτυρία.

These alternatives may change the focus or emphasis, but not the basic meaning. The original version is the most straightforward and neutral.

Usually it is not necessary.

Greek often does not use subject pronouns unless there is emphasis or contrast. The noun η μαρτυρία already tells us what the subject is, so adding a pronoun would normally be unnecessary.

Greek is a language where subjects are often clear from the verb form or from the noun phrase itself.

You add δεν before the verb:

• Η μαρτυρία δεν είναι ξεκάθαρη.

This means The testimony is not clear.

That is the normal way to negate a sentence with είναι.

The dictionary forms are:

• η — the feminine singular definite article
• μαρτυρία — testimony, evidence, witness statement
• είμαι — to be
• ξεκάθαρος — clear, plain, obvious

Notice that adjectives are usually listed in dictionaries in the masculine singular form, so even though the sentence has ξεκάθαρη, the dictionary entry is ξεκάθαρος.

Not always exactly.

Μαρτυρία usually refers to:

• testimony
• a witness statement
• what someone says as a witness
• sometimes evidence in a broader sense, depending on context

So the exact English translation depends on the situation. In legal or formal contexts, testimony is often the best match.