Seeing a spider and running away from it is something that seems like a very natural fear that people feel is very similar to the fear that you feel when you observe a situation that causes your fears to surface. Now it is very different to see the same spider and run away in terror is symptom of suffering from the phobia called Arachnophobia, the same pertaining to the phobias that people have towards animals and I could say that it is one of the most common. The word "arachnophobia" is formed with Greek roots and means "irrational fear of spiders". Its lexical components are: arachne (spider) and phobos (irrational fear), plus the suffix -ia (quality).