Η μαρτυρία είναι απολύτως ξεκάθαρη.

A natural pronunciation is:

i mar-ti-RI-a EE-ne a-po-LI-tos xe-KA-tha-ri

A more careful breakdown:

• Η = i
• μαρτυρία = mar-ti-RI-a
• είναι = EE-ne
• απολύτως = a-po-LI-tos
• ξεκάθαρη = xe-KA-tha-ri

A few pronunciation notes:

• η sounds like ee.
• ει in είναι also sounds like ee.
• ξ sounds like ks.
• χ in ξεκάθαρη is not like English ch. Here it is a rough sound, like the h in some pronunciations of Spanish j, but lighter before e.

The stressed syllable is marked by the accent:

• μαρτυρία
• είναι
• απολύτως
• ξεκάθαρη

Η is the feminine singular definite article, meaning the.

So:

• Η μαρτυρία = the testimony / the evidence / the witness statement, depending on context

It is capitalized here only because it is the first word of the sentence. In the middle of a sentence, it would be η.

Yes, it matters grammatically.

μαρτυρία is a feminine noun in Greek. Because it is feminine singular nominative, the article and adjective must match it:

• Η = feminine singular the
• μαρτυρία = feminine singular noun
• ξεκάθαρη = feminine singular adjective

This kind of agreement is very important in Greek. English does not do this much, but Greek does it all the time.

μαρτυρία often means:

• testimony
• witness statement
• evidence

The exact meaning depends on context.

For example:

• in a legal context, it often means testimony or witness statement
• in a broader context, it can mean evidence
• in a religious or literary context, it can even mean witnessing or bearing witness

So if the English meaning shown to the learner is something like The testimony is absolutely clear, that is a very natural reading.

είναι means is.

This is the 3rd person singular form of the verb to be:

• I am
• you are
• he/she/it is → είναι

So the sentence structure is very straightforward:

• Η μαρτυρία = the testimony
• είναι = is
• απολύτως ξεκάθαρη = absolutely clear

Greek usually keeps είναι in this kind of normal statement, just as English uses is.

απολύτως is an adverb meaning:

• absolutely
• completely
• entirely

It modifies the adjective ξεκάθαρη.

So:

• ξεκάθαρη = clear
• απολύτως ξεκάθαρη = absolutely clear

This is similar to English adverbs modifying adjectives:

• very clear
• totally clear
• absolutely clear

Because it agrees with μαρτυρία, which is feminine singular.

The basic adjective is ξεκάθαρος = clear. It changes form depending on gender and number:

• ξεκάθαρος = masculine singular
• ξεκάθαρη = feminine singular
• ξεκάθαρο = neuter singular

Since μαρτυρία is feminine singular, Greek uses:

• ξεκάθαρη

Examples:

• Ο λόγος είναι ξεκάθαρος = The speech is clear.
• Η μαρτυρία είναι ξεκάθαρη = The testimony is clear.
• Το μήνυμα είναι ξεκάθαρο = The message is clear.

They are similar, but not always identical in tone.

• ξεκάθαρη often feels like crystal clear, plain, or unambiguous
• σαφής means clear, precise, or definite, and can sound a bit more formal

So:

• Η μαρτυρία είναι απολύτως ξεκάθαρη sounds natural and strong
• Η μαρτυρία είναι απολύτως σαφής is also possible, but a bit different in style

A learner should think of ξεκάθαρη as a very common, natural everyday way to say something is clearly understandable.

Yes, Greek word order is more flexible than English, although not every order sounds equally natural.

The neutral word order here is:

• Η μαρτυρία είναι απολύτως ξεκάθαρη.

You could also move things for emphasis, for example:

• Απολύτως ξεκάθαρη είναι η μαρτυρία.

That sounds more marked or emphatic, something like:

• The testimony is absolutely clear or even
• Absolutely clear is the testimony

But for normal learning purposes, the original sentence is the best basic pattern.

Greek uses accent marks to show which syllable is stressed.

In this sentence:

• μαρτυρία
• είναι
• απολύτως
• ξεκάθαρη

This is very important because stress is part of the correct word form and pronunciation. In written Greek, you should normally include these accents.

For an English speaker, it helps to learn each new Greek word together with its stress.

Yes, but the meaning changes slightly.

• πολύ ξεκάθαρη = very clear
• απολύτως ξεκάθαρη = absolutely clear

απολύτως is stronger and more absolute. It suggests there is no doubt at all.

So both are correct, but they are not identical:

• Η μαρτυρία είναι πολύ ξεκάθαρη = The testimony is very clear.
• Η μαρτυρία είναι απολύτως ξεκάθαρη = The testimony is absolutely clear.

You add δεν before the verb:

• Η μαρτυρία δεν είναι απολύτως ξεκάθαρη.

That means:

• The testimony is not absolutely clear.

This is the standard way to negate είναι in Modern Greek:

• είναι = is
• δεν είναι = is not

The pattern is:

article + noun + verb to be + adverb + adjective

So here:

• Η = the
• μαρτυρία = testimony
• είναι = is
• απολύτως = absolutely
• ξεκάθαρη = clear

This is a very useful pattern for building simple Greek sentences, for example:

• Η απάντηση είναι πολύ σωστή. = The answer is very correct.
• Το πρόβλημα είναι αρκετά σοβαρό. = The problem is quite serious.
• Η εικόνα είναι εντελώς θολή. = The image is completely blurry.

So this sentence is a good model for many similar statements.