zealous
UK: ˈzel.əs | US: ˈzel.əs
adj. filled with or showing intense enthusiasm or passion for a cause, ideal, or goal
The word "zealous" originates from the Greek zēlos (meaning "ardor" or "passion"), which entered Late Latin as zelus. It merged with the Latin adjectival suffix -osus (indicating "full of") to form zelosus in Medieval Latin. This evolved into Old French zelos, and later into English "zealous" in the 16th century. The term reflects a fervent, almost competitive enthusiasm, historically tied to religious devotion but now applicable to any intense dedication.
She was zealous in her efforts to promote environmental sustainability.
The team’s zealous commitment led them to victory.
His zealous advocacy for human rights inspired many.
Critics accused the leader of being overly zealous in enforcing new policies.
The artist approached her work with a zealous attention to detail.