definitely, completely sure
Der Bastard würde die Sache ganz sicher verkomplizieren.
The bastard would definitely complicate things.
Ich werde dich morgen ganz sicher besuchen.
I will definitely visit you tomorrow.
Tom will von Maria ganz sicher keinen Rat annehmen.
Tom definitely won’t take any advice from Maria.
Er wird ganz sicher die Prüfung bestehen.
He will definitely pass the exam.
Tom, geht es dir auch ganz sicher gut?
Tom, are you absolutely sure you're okay?
Are you absolutely sure about that?
Da war jemand im Bett, ich bin ganz sicher.
Someone was in the bed, I’m absolutely sure.
— Das Waisenhaus (2007)
Und in Loricum ganz sicher, jedenfalls in Lore-West und Lore-North.
And definitely in Loricum, at least in Lore-West and Lore-North.
Bist du dir dessen ganz sicher?
Are you absolutely sure about that?
Ganz sicher scheinen Sie aber nicht zu sein.
But you don’t seem entirely sure.
— Der Baader Meinhof Komplex (2008)
Ich war mir da nicht ganz sicher.
I wasn’t entirely sure about that.
Wir sind uns nicht ganz sicher, was das Problem ist.
We're not entirely sure what the problem is.
Are you absolutely sure about that?