The first line of self defense is (1) environmental awareness and (2) avoidance. Wherever you're at be aware of your surroundings, objects that could be used to aid you in self defense should the need arise, and avenues of escape, be aware of other people, take notice of their body language and general appearance. Keep your ears open to any sound. Secondly, avoid any areas where you may find yourself in a bad situation, such as dead end alleys, back alleys, rough areas of town, bars, and clubs. If you're an older person try to travel in groups with friends and follow rules 1 and 2 above.
The analogy of sagacious is wise: both terms refer to possessing keen insight, intelligence, and good judgement. Just as someone who is sagacious is known for their wisdom, someone who is wise is appreciated for their sagacity.
a prudent decision adjectives and their opposites
Prudent means careful; circumspect; acting with forethought.
Prudent
Prudent means sensible and making wise decisions. Prudent living means living in a conscientious and sustainable way and not having a wasteful, thoughtless, or excessive lifestyle.
"Sound and reasonable" just means that he wasn't insane and couldn't use the insanity defense to escape being executed.
It means "be careful"
It pretty much means as it says. Reasonable is defined as what the average person of the general public would deem prudent and commonly acceptable under a given circumstances.
foresight
The adjective prudential is a form of the word prudent, which means careful, discreet, cautious, wise or reasonable. Prudential guidance would be guidance given in a careful, discreet, cautious, wise, or reasonable manner. An example sentence:The supervisors on Answers.com give prudential guidanceto prevent newcomers to the site from abusing the privileges.
Not sure if I am answering your question - but I belive you are talking about the "defense" of self-defense; which generally means you are able to use reasonable force to defend yourself from bodily harm (or death).
Sagacious in adapting means to ends; circumspect in action, or in determining any line of conduct; practically wise; judicious; careful; discreet; sensible; -- opposed to rash; as, a prudent man; dictated or directed by prudence or wise forethought; evincing prudence; as, prudent behavior., Frugal; economical; not extravagant; as, a prudent woman; prudent expenditure of money.