When you say "mind" you are saying "be aware of" or "be careful with" not to be confused with "beware of".
They might overlap, depending on why you may want to be aware of something. You might need to "mind the dog" because he bites or you might need to "mind the dog" because you are about to absent-mindedly step on it's tail.
"Beware of your head" is strange sounding. "Mind your head" means to be careful with your head. "Beware of" in this context implies that your head is going to do something bad to you, whereas "mind your head" is meant to say be careful not to let something bad happen to your head.
"Redundant" involves repetition. In the following example, there are two examples of redundancy: "This blue, azure shirt is torn and ripped." Blue and azure are redundant, and torn and ripped are redundant. Note that these redundancy pairs do not include words that are exactly synonymous, but which are close enough in meaning that one would usually consider them redundant. Two points here: 1. Neither word in such a pair is necessarily the redundant one; either one can be considered redundant, depending on which one you consider to be the more important, useful, or accurate one in the given context. Commonly, the second word is considered the redundant one, but that is merely because the first word got a chance to establish itself before the second one came along; if you were revising the text, you might choose to keep the second, not the first. 2. The same word repeated ("this blue blue shirt") is an example of redundancy, but this is usually done for emphasis, or for poetic effect, and so is seldom saddled with the accusation of redundancy. Thus, "redundant" does tend to carry the implication of an unnecessary repetition.
A tip: To help you remember this, note that "redundant" begins with "re," as in "repetition." That piece of these words means "again."
"Superfluous," on the other hand, refers to something that is more than what is necessary. Think of water running over the rim of a glass when you continue to pour water into it beyond its capacity. The water over- (super) flows (fluous). Often something superfluous is so because it is needlessly repetitive, and this confuses the picture a bit. But in my opinion, "superfluous" is better used when the element is not repetitive, but is genuinely not needed, as in this example: "After George embedded the fence post in thirty pounds of concrete buried underground, the brick he balanced atop the post to hold it down was superfluous."
Best Answer
The word nation has its origin in the Latin natio-, from nat- meaning 'born'. It refers to a body of people united by birth, history, language, culture, and so on. The idea of a nation as a sovereign state came later, the notion of borders being a relatively recent invention.
Consider the term First Nations, which is used to refer to the indigenous peoples of Canada, for example. The term is also applied to other groups of people who are without a country (in the modern sense), such as the Roma.
The term people (from Latin populus) can be defined as above for nation. I would say the two words are synonymous in this context.