forfeit

The story

1. Medieval Latin · derived fromforis factum
2. Old French · derived fromforfait“crime”
3. Middle English · inherited fromforfait
4. English todayforfeit

From Middle English forfait from ca. 1300, from Old French forfait (“crime”), originally the past participle of forfaire (“to transgress”), and Medieval Latin foris factum. During the 15th century, the sense shifted from the crime to the penalty for the crime.