Words similar to swear

Example sentences for: swear

How can you use “swear” in a sentence? Here are some example sentences to help you improve your vocabulary:

The film presents Eastwood as Steve Everett, a philandering ex-alcoholic with (I swear that the movie exhumes this phrase) a "nose for truth."
One can easily see, though, how in some hands this could lead to pandering--the nominal analogue of ticket-balancing ("I, William Jefferson Roosevelt Kennedy Patton Rosa Parks Harvey Milk Sitting Bull Clinton, do solemnly swear ..."
On Nashiri's refusal to swear allegiance, see Intelligence report, interrogation of KSM, Nov. 21, 2003.
Upon choosing a trainee, Bin Ladin would ask him to swear loyalty for a suicide operation.
I swear!"