absolutely certain, dead sure
Das ist todsicher.
That's for sure.
— Once Upon a Time... in Hollywood (2019)
Todsicher!
Sure thing!
— Plötzlich Papa (2016)
Ich bin mir todsicher.
I’m absolutely certain.
— Nobody Knows (2004)
Todsicher.
Absolutely certain.
— Django Unchained (2012)