in fear or dread of possible evil or harm; "apprehensive for one's life"; "apprehensive of danger"
mentally upset over possible misfortune or danger etc; "apprehensive about her job"; "not used to a city and worried about small things"; "felt apprehensive about the consequences"
quick to understand; "a kind and apprehensive friend"- Nathaniel Hawthorne
based on or manifesting objectively defined standards of rightness or morality; "principled pragmatism and unprincipled expediency"; "a principled person"
incapable of failure or error; "an infallible antidote"; "an infallible memory"; "the Catholic Church considers the Pope infallible"; "no doctor is infallible"