The phrase "at convenience" describes something that is comfortable, easy, and suits someone's personal schedule. The antonyms for "at convenience" include "inconvenient", "difficult", "uncomfortable", and "unfavorable". These words suggest that a situation does not fit well with someone's needs or preferences. For example, if a task is inconvenient, it may require extra effort or time, and if a location is uncomfortable, it may cause physical or emotional discomfort. In general, antonyms for "at convenience" describe situations that are problematic, challenging, or unsuitable for someone's needs, highlighting the importance of considering others' circumstances and perspectives when making plans or decisions.