Unique - different, no other like it
Natural - Some take this to mean that there are no additives that are not found in nature. In reality, natural has not been defined in food labeling and can actually mean almost anything.
Best - Better than all others. This term is subjective when refering to food.
Pure - Free of impurities and contaminants.
Natural selection
Conservation of natural resources
Pure pwnage is a slang term. It's usually used in video games, or in cut downs, it means that you've basically beat someone at something or got the best of them.
global warming
The term pure mixture doesn't exist; the components can be more or less pure.
There is no standard meaning for the term "nachural." It is possible that it is a misspelling of the word "natural," which typically refers to something that is not made or changed by humans, existing in a pure state in the environment.
It could be called that but not best use of term. Disaster implies natural.
Pure.
pure, unadulterated,
yes, some water is pure,and so water is contaminated.
For the Term of His Natural Life was created in 1870.
The term of the unique rotational movement of Venus is retrograde