The antonyms for the word "more painless" can be "more painful", "agonizing", "torturous", "harsh", "brutal", "debilitating", "excruciating", "horrific", "severe", "suffering". These words are opposites of the term "more painless", indicating a higher level of discomfort or physical suffering. While the phrase "more painless" refers to an experience that is not as difficult or uncomfortable, its antonyms are words that denote a situation or circumstance that causes significant discomfort to an individual. It is important to be familiar with antonyms as they allow an individual to effectively express themselves, conveying the exact opposite meaning of a given word.