The antonyms for the word "most life-or-death" are not as straightforward as other words. However, some possible antonyms for this phrase could include trivial, insignificant, unimportant, nonessential, noncritical, or nonurgent. These terms all suggest that something is not crucial or vital, and does not require immediate attention or action to ensure survival. In contrast, the phrase "most life-or-death" implies the highest degree of importance and urgency, with potentially life-altering consequences. In summary, the antonyms for "most life-or-death" emphasize the opposite of urgency and importance, with a focus on the mundane, trivial, and unnecessary.