بالتأكيد.

English Translation

Of course!

•	“بـ” (bi): This is a preposition meaning “with” or “by.”
•	“الـ” (al): This is the definite article “the.”
•	“تأكيد” (taqīd): This is a noun meaning “confirmation” or “affirmation.”

So, altogether, “بالتأكيد” means “certainly” or “definitely” in Arabic.