acharné
Acharné is a French adjective that translates to fiercely determined, relentless, or dogged in English. It describes someone or something that pursues a goal with great intensity and persistence, often in the face of obstacles or opposition. The term can be used to describe a person's attitude or effort, such as an acharné worker or an acharné competitor. It can also describe a struggle or conflict that is characterized by its ferocity and unwillingness to yield, like a bataille acharnée (fierce battle).
The word derives from the verb acharné, meaning to become furious or to become savage. This etymology