In the least is a phrase often used to express the minimum degree or amount of something. Some synonyms for the phrase are "at all," "in the slightest," "barely," "scarcely," "hardly," and "not in the slightest." These words or phrases suggest that there is little to almost no influence or impact on a situation. They are used to imply that something is insignificant, unimportant, or not worth mentioning. One can use them to express a negative response or desire to do something. Overall, these synonyms for in the least help to convey the message that there is very little to nothing that is happening or being done.