acharné
fierce
adjective ah-shar-NEH Rare
Origin: Past participle of acharner, from à + chair (flesh), evoking an animal set on its prey.
Also means
relentless
Usage Note
Acharné describes intense, dogged effort or aggression, as in un combat acharné ('a fierce battle') or un travailleur acharné ('a relentless worker'). The feminine form is acharnée. The related noun acharnement means 'relentlessness' or 'ferocity'.
Examples
"C'est un défenseur acharné des droits."
Natural Translation
He is a fierce defender of rights.

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