The term "over-run" implies a situation where something or someone has taken control over a particular area or situation. Antonyms for this word would be under-control, guarded, regulated, and restrained. These words convey a sense of order and discipline, suggesting that the situation is not chaotic or out of control. Under-control is the exact opposite of over-run, indicating a situation that is being managed effectively. Guarded and regulated also suggest a sense of control and monitoring, which may help prevent any overrunning. Finally, restrained implies a sense of limitation or moderation, suggesting a state of being in control and balanced.