"Thanks!"

Translation: Dzięki!

[JoostVunde]

Dzięki is the "informal" form of "dziękuję". You generally only use it with people you know well.

[dont_tread_on_me]

I didn't even know the word, only in Slovak which is d'akujem, and i guessed, then its probably "dziekuje", and it was actually correct :D

[idanlipin]

Either dzięki or dziękuję (which is more of thank you)

[Samuel648817]

Wow!

[Lafemme761451]

I think, dziękuję means thanks resp. thank you where dzięki stands for thanks to resp. due to. In German danke bzw. dank.