Related Clues:

• Testified
• Cursed
• Made a statement on a stack of Bibles?
• Prepared to testify
• Made a solemn declaration
• Talked a blue streak?
• Promised emphatically
• Made an oath
• Pawned
• Pledged
• Crossed one's heart, e.g.
• Used four-letter words
• Tried to get into a frat
• Attested
• Uttered oaths