This is the 15729th most frequent Polish word.
szczęśliwie
"Happily" or "fortunately."
Here, 'szczęśliwie' is employed to express happiness or satisfaction regarding the completion of the project.
Szczęśliwie, udało im się zakończyć projekt na czas.
Happily, they managed to complete the project on time.
The word 'szczęśliwie' is used here as an adverb to mean 'luckily', indicating a fortunate outcome.
Szczęśliwie dotarłem do domu przed burzą.
Luckily, I arrived home before the storm.
In this sentence, 'szczęśliwie' describes how the action of finding the wallet happened – it implies relief or gratitude.