This is the 172nd most frequent Hungarian word.
ezért
"Therefore" or "for this reason."
Here, 'ezért' is used to indicate the consequence of an action or decision.
Tanulok, ezért jól fogok vizsgázni.
I study, therefore I will perform well on the exam.
In this sentence, 'ezért' is used to express a conclusion drawn from the situation.
Köszönöm, hogy segítettél, ezért hálás vagyok.
Thank you for helping me; therefore, I am grateful.
Here 'ezért' connects the reason for the action with the action itself.