oppugn

UK: /əˈpjuːn/ US: (ə pyo̅o̅n′)

WordReference Random House Unabridged Dictionary of American English © 2025

op•pugn  (ə pyo̅o̅n′), v.t. 

1. to assail by criticism, argument, or action.
2. to call in question;
   dispute.

• Latin oppugnāre to oppose, attack, equivalent. to op- op- + pugnāre to fight, derivative of pugnus fist; see pugilism
• late Middle English 1400–50

op•pugn′er, n. 

Collins Concise English Dictionary © HarperCollins Publishers::

oppugn / əˈpjuːn/ verb

1. (transitive) to call into question; dispute

Etymology: 15th Century: from Latin oppugnāre, from ob- against + pugnāre to fight, from pugnus clenched fist; see pugnacious

opˈpugner noun