Fervently:
This is an adverb that describes the manner of doing something with intense passion, enthusiasm, or belief. It suggests a deep emotional commitment or dedication to a cause or activity. For example, "She fervently believed in the power of education to change lives."
Vigilant:
This is an adjective that describes the state of being watchful, alert, or attentive to potential danger, risks, or threats. It suggests a sense of caution and awareness, often in relation to security or safety. For example, "The security guard was vigilant in monitoring the premises for any suspicious activity."