zealous
adjective /ˈzeləs/
  /ˈzeləs/
 (formal)- showing great energy and enthusiasm for something, especially because you feel strongly about it热情的;热烈的;充满激情的 - a zealous reformer充满激情的改革者 
 词源early 16th cent.: from a medieval Latin derivative of Latin zelus ‘zeal, jealousy’.
- a zealous reformer