Definition of amerce in US English:

amerce

verb

[with object]English Law
historical
  • Punish with a fine.

    ‘the defendant shall be amerced for his trespass’

Origin

Late Middle English: from Anglo-Norman French amercier ‘to assess, to fine’, based on estre en la merci ‘be at the mercy of another (as to the amount of a fine)’.

Pronunciation

amerce

/əˈmərs//əˈmərs/