尽管面对强大的对手，这位拳击手依然表现出了旺盛的斗志。

The boxer showed his ___feisty spirit even against the stronger opponent.

那个脾气暴躁的小狗对任何靠近它食物的人都会吠叫。

The ___feisty little dog barks at anyone who comes near its food.