Used inelegant language

• Said "!@#$%"
• Gave one's word
• Talked impolitely
• Talked like a sailor
• Gave an oath
• Testified under oath
• Vowed southwest will get valuable mineral

Wiktionary Word definitions in Wiktionary
vb. (en-simple pastswear)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Swear \Swear\, v. i. [imp. Swore , formerly Sware ; p. p. Sworn ; p. pr. & vb. n. Swearing .] [OE. swerien, AS. swerian; akin to D. zweren, OS. swerian, OHG. swerien, G. schw["o]ren, Icel. sverja, Sw. sv["a]rja, Dan. sv[ae]rge, Icel. & Sw. svara to answer, ...