尽管面临经济困难，他依然是个不屈不挠的奋斗者。

Despite financial hardships, he remains a relentless ___battler who keeps pushing forward.

尽管不被看好，这位拳击手证明了自己是一名真正的斗士，坚持到了最后一轮。

Though underestimated, the boxer proved himself a true ___battler by lasting till the final round.