To guarantee by a solemn promise
To use profane or obscene language
To give evidence or testimony under oath
To cease trying to accomplish or continue
To take an oath
I swear to God, I've had it with all this shit.
I swear I would have seen anyone who was nearby.
If you let anything happen to her, I swear to the Original Beings I'll haunt you from the grave for the rest of your life!
He'd kill me; I swear to God, he would!
I swear, I never intended for things to go that far.