English
impugner
From impugn + -er.
A compound of impugn + -er
Proto-Indo-European *pewǵ- ‘prick, punch’
…
Latin pugnus ‘fist’
Latin pugnō ‘fight’
Latin impugnō ‘to attack, fight against’
Middle French impugner ‘to attack’
English impugn
Today it means
noun One who impugns; one who opposes or contradicts.
Language periods are conventional ranges, not dates for this word.
Etymograph / impugner