[ˈfɔːrɪswɔːr]

Definitions

1. verb

to swear or take an oath that one will do something, especially in a formal or solemn manner

“He foreswore his allegiance to the crown and took up arms against the king.”

2. noun

a solemn oath or promise, especially one that is taken in formal circumstances

“Breaking a foresworn oath was considered a serious offense in medieval times.”