Post-haste is a term used to describe the act of doing something quickly or in a hurry. Antonyms for post-haste would include words such as slowly, leisurely, unhurried, and languidly. While post-haste implies a sense of urgency and haste, these antonyms convey the exact opposite. Taking time to do something thoughtfully and deliberately can often be more effective than rushing through a task. It's important to remember that not all tasks require immediate attention and sometimes it's better to slow down and take your time. By knowing the antonyms for post-haste, you can choose the best approach for any given situation.