Αμφισβητώ την προσαύξηση, αλλά εξοφλώ τον λογαριασμό.

Because Greek often drops the subject pronoun when it is already clear from the verb ending.

Both αμφισβητώ and εξοφλώ are first person singular forms, so the sentence already tells you I dispute and I pay off.

You could add εγώ for emphasis or contrast:

Εγώ αμφισβητώ την προσαύξηση, αλλά εξοφλώ τον λογαριασμό.

That would sound more like I’m the one disputing the surcharge, but I’m paying the bill off.

They are both present tense, active voice, indicative mood, first person singular.

So grammatically they mean:

• αμφισβητώ = I dispute / I am disputing
• εξοφλώ = I pay off / I am paying off

In Greek, the present tense can often cover both:

• simple present: I dispute
• present continuous: I am disputing

The exact English translation depends on context.

These are the definite articles:

• την = the for a feminine accusative singular noun
• τον = the for a masculine accusative singular noun

They are used because both nouns are direct objects of the verbs:

• αμφισβητώ την προσαύξηση = I dispute the surcharge
• εξοφλώ τον λογαριασμό = I pay off the bill

Greek uses the definite article very frequently, often more than English does, especially when talking about a specific thing.

This is a matter of noun declension.

λογαριασμός

This is a masculine noun.

• Nominative: ο λογαριασμός
• Accusative: τον λογαριασμό

So the ending changes from -ος to -ο in the accusative singular.

προσαύξηση

This is a feminine noun.

• Nominative: η προσαύξηση
• Accusative: την προσαύξηση

Here, the noun itself stays the same in nominative and accusative singular; only the article changes.

So this sentence is also a good example of how Greek case can be shown by:

• the article alone, or
• the article plus the noun ending

This is a very useful distinction.

• πληρώνω = pay in a general sense
• εξοφλώ = pay off, settle in full, clear a debt or bill

So εξοφλώ τον λογαριασμό is stronger and more specific than πληρώνω τον λογαριασμό.

It suggests that the bill is being fully settled, not just paid in some general or partial way.

That matches the contrast in the sentence well:
I dispute the surcharge, but I still settle the bill.

In this kind of context, προσαύξηση usually means an additional charge, surcharge, increase, or sometimes a penalty amount added on top.

It is more specific than a general word like αύξηση (increase).

So:

• αύξηση = increase in general
• προσαύξηση = an extra added amount, often in financial, administrative, or legal language

That is why it fits well in a sentence about a bill.

Because αλλά means but, and in Greek it is very normal to put a comma before it when it connects two clauses.

So:

Αμφισβητώ την προσαύξηση, αλλά εξοφλώ τον λογαριασμό.

This punctuation is standard and natural.

It works much like English punctuation in a sentence such as:

I dispute the surcharge, but I pay off the bill.

Yes. Greek word order is more flexible than English because the verb endings and case forms already show a lot of the grammar.

The version you have is a neutral, straightforward order:

• verb + object
• conjunction
• verb + object

That said, Greek can move words around for emphasis, contrast, or style.

For example:

Την προσαύξηση αμφισβητώ, αλλά τον λογαριασμό τον εξοφλώ.

This gives extra emphasis to the two objects, almost like:

The surcharge I dispute, but the bill I do pay off.

So yes, the order can change, but the original sentence is the most neutral and learner-friendly version.

A rough pronunciation guide is:

am-fiz-vee-TO tin pro-SAF-ksee-see, a-LA ek-so-FLO ton lo-gha-ria-SMO

A few helpful pronunciation points:

• αμφισβητώ: the stress is on the last syllable
• β sounds like v
• φ sounds like f
• ξ sounds like ks
• αυ in προσαύξηση sounds like af here, because it comes before the voiceless sound ξ
• η, ι, υ, ει, οι often sound like ee in Modern Greek

So:

• προσαύξηση sounds roughly like pro-SAF-ksee-see
• εξοφλώ sounds roughly like ek-so-FLO

Yes, it is fairly formal or neutral-formal in tone.

αμφισβητώ means dispute, question, or challenge, especially in a serious or official sense.

So in a billing, legal, or administrative context, it sounds very natural.

In more everyday speech, people might sometimes use other expressions depending on the exact meaning, but αμφισβητώ is a good standard verb when you want to say that you formally challenge or do not accept something.

Usually, not in the same way.

Greek strongly prefers the articles here because the sentence is talking about specific, identifiable things:

• the surcharge
• the bill

If you removed them, the sentence would sound unnatural in most normal contexts or would change the meaning.

So:

• την προσαύξηση
• τον λογαριασμό

are the natural choices.

This is one of the places where Greek uses the definite article more regularly than English learners may expect.