The term "un-extreme" refers to something that is not extreme or radical. Antonyms for "un-extreme" can include words like ordinary, moderate, average, and conventional. These words typically describe things that are within the normal range and do not exceed expected limits. For example, an average temperature would be an antonym for an extreme temperature. Similarly, a moderate approach to politics could be considered an antonym for an extreme ideology. The use of antonyms allows us to better convey a range of meanings and tones, helping us to more precisely and accurately communicate our thoughts and ideas.