1 scientific law (e.g. law of conservation of energy)

2 (in human affairs) a generalization based on observation (e.g. "power corrupts")

1 lawyer

1 to take precautions

2 to guard against (emergency)

1 (finger) ring

1 to give up smoking

1 to serve as a warning (idiom)

1 thousand articles, same rule (idiom); stereotyped and repetitive

2 once you've seen one, you've seen them all

1 to be strict with oneself (idiom)

2 to demand a lot of oneself

1 to refrain from high standard of living (idiom)

1 to guard against pride and impatience (idiom); to remain modest and keep cool