Ceasing, pausing, halting, or stopping could be the antonyms for the word "more ceaselessly." When something is done ceaselessly, it means it is done continuously without any break, stop or halting. To look for antonyms, one has to find words that denote the opposite of this definition. For instance, ceasing refers to stopping, which contrasts with "more ceaselessly." Additionally, pausing relates to taking a break or resting, something that "more ceaselessly" wouldn't permit. Halting refers to coming to a stop, so it's the opposite of "more ceaselessly." Ultimately, the above antonyms provide the opposite meaning of the term "more ceaselessly.