- thirdborough
- \\ˈthərdˌ ̷ ̷(ˌ) ̷ ̷\ noun
Etymology: Middle English thridborro, probably by folk etymology (influence of Middle English thirde, thridde, thrid third) from frithborg frankpledge — more at frithborh: a former English peace officer especially of a tithing
Useful english dictionary. 2012.