Definition of propugner in US English:

propugner

noun

rare
  • A defender, a champion; a vigorous advocate.

Origin

Late 16th century; earliest use found in Andrew Willet (d. 1621), Church of England clergyman and religious controversialist. From propugn + -er.

Pronunciation

propugner

/prə(ʊ)ˈpjuːnə/