Word Knowledge

As an ASVAB tutor, I explain the importance of knowing Greek and Latin roots to the students in my ASVAB prep course.  Today I present a question about a root word.  Do you know what

-phobe or -phobia means?  Examples of words that have the root word -phobe or -phobia are arachnophobe, arachnophobia, agoraphobe, agoraphobia, pyrophobe, pyrophobia, claustrophobe, claustrophobia. What does -phobe or -phobia mean?   I will present the answer tomorrow.