Adjective. Being BOTH vigilant (being alert, cautious, watchful of possible danger or difficulties) AND diligent (
effort done with, or being
steady, persistent, persevering ).
Noun = Viligence
Adverb = Viligently
Lily was viligent, making her rounds every hour, every
day, every year of her life, making
sure no intruders would ever enter her home on her watch. Even when she was old and gray, she still investigated every
squirrel-like, cat-like, human-like or alien-like noises.