The phrase "till end time" stands for eternity or infinity, suggesting a continuous and uninterrupted period that never ceases to exist. The antonyms for this phrase could be "temporary," "limited," or "finite." In contrast to the endlessness of "till end time," these antonyms denote a temporary state or a restricted time frame. For instance, a project that has a temporary deadline will come to an end eventually, and it can be measured within a finite duration. Similarly, any activity or event with a limited time frame or a fixed ending point cannot be said to continue "till end time." In summary, the antonyms for "till end time" represent a bounded, measured, and defined aspect of time, unlike the boundless infinity it implies.