The term "un deliberate" is typically used to describe things that were not done consciously or intentionally. There are many antonyms for this word that relate to actions that are planned or thoughtful. These include words like deliberate, intentional, purposeful, calculated, and premeditated. Other antonyms for "un deliberate" could include unplanned, impromptu, spontaneous, offhand, hasty, or thoughtless. Depending on the context and the intended meaning, different antonyms may be more appropriate to use. Overall, there are many words that can be used to express the opposite of "un deliberate" and to describe actions that are done intentionally.