How do you say "Ευχαριστώ" in Greek?

"Ευχαριστώ" in Greek means "Thank you". The standard way to say 'thank you' in Greek. Adding 'πολύ' makes it 'thank you very much'.

Can you give an example of "Ευχαριστώ" in a sentence?

"Ευχαριστώ πολύ για τη βοήθεια" which translates to "Thank you very much for the help"

Thank you + intensifier + preposition + definite article + noun. The syntax is: Ευχαριστώ + πολύ + για + object