Which word best describes someone who is "zealous"?

The word "zealous" is used to describe someone who shows great enthusiasm, eagerness, or devotion toward a cause, idea, or person. When a person is zealous, they are typically passionate and committed, which aligns perfectly with the idea of being eager and devoted. This term conveys a sense of proactive support and vigor in pursuing their interests or beliefs.

In contrast, the other choices present attitudes that are fundamentally opposed to zeal. Indifferent and apathetic suggest a lack of interest or concern, which is the opposite of enthusiasm. Cynical and dismissive convey skepticism and a lack of appreciation for what others may value, again contrasting with the passionate conviction associated with being zealous. Casual and uninspired indicates a relaxed or unenthusiastic approach to life, failing to capture the intensity implied by zeal. Therefore, "eager and devoted" is the most accurate descriptor for someone who embodies a zealous attitude.