Took an oath in court

• Used indelicate language
• Made a promise
• Used colorful language
• Testified under oath
• Talked a blue streak?
• Promised to tell the truth
• Talked like a sailor
• Said a four-letter word
• Gave earnest assurances

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Swore \Swore\, imp. of Swear .