The word "over-did" implies doing more than necessary or going beyond the limit. Some of the antonyms for over-did include underdid, undertook, and underperformed. At times, doing too much can be harmful and cause fatigue or negative side effects. To avoid this, it is essential to find balance and not overdo things. Knowing when to stop or scale back is crucial to maintaining mental and physical health. Underdoing, on the other hand, means not putting in enough effort, which can result in unsatisfactory results. Undertaking, on the other hand, means doing the right amount and achieving satisfactory outcomes without going overboard.