Look around you and every liquid you see will probably be either an acid or a base. The only exception would be distilled water.
Distilled water is just water, that's it.
Most water you drink has ions in it, and it is those ions which make something acidic or basic. When you put that in water it makes a base. Distilled water is 7, right in the middle. When you start looking at the pH of chemicals, the numbers go to the extremes. Those chemicals are very dangerous.