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:

KSM does acknowlNOTES TO CHAPTER 7 525 edge that the commander of al Faruq training camp was known to urge trainees to swear bayat.
I swear that they were laughing at us.
Prudie knows people who swear by the Zone, and others who swear at it.
I swear!"
I swear to God.