perforce

UK: /pəˈfɔːs/ US: /pɚˈfɔrs/ ,(pər fôrs′, -fōrs′)

WordReference Random House Learner's Dictionary of American English © 2025

per•force /pɚˈfɔrs/   adv. 

1. of necessity;
   necessarily:
   We must, perforce, accept some problems as the price for our success.

WordReference Random House Unabridged Dictionary of American English © 2025

per•force  (pər fôrs′, -fōrs′), adv. 

1. of necessity;
   necessarily;
   by force of circumstance:
   The story must perforce be true.

• Middle French
• 1300–50; per + force; replacing Middle English par force

Collins Concise English Dictionary © HarperCollins Publishers::

perforce / pəˈfɔːs/ adverb

1. by necessity; unavoidably

Etymology: 14th Century: from Old French par force; see per, force¹