Homophobia (from Greek ὁμο homo(sexual), "same, equal" + φοβία (phobia), "fear", literally "fear of the equal") is the fear of, aversion to, or discrimination against homosexuality or homosexuals. Several dictionaries also associate irrationality with this type of fear. It can also mean hatred, hostility, disapproval of, or prejudice towards homosexual people, sexual behavior, or cultures, and is generally used to insinuate bigotry. Homophobic is the adjective form of this term used to describe the qualities of these characteristics while homophobe is the noun form given as a title to individuals with "homophobic" characteristics. Some people believe any usage of this term is controversial.