The term 'more split-second' suggests something that happens very quickly, without any delay. The antonyms for this term could include slow, sluggish, delayed, sluggishness, hesitation, procrastination, or reluctance. These terms depict a scenario where things happen at a slower pace, causing delays, indecisiveness, or second thoughts. While 'more split-second' connotes a sense of immediacy and urgency, its antonyms paint a picture of a situation that requires more time and thought before taking action. Therefore, it is essential to consider the particular circumstances before applying the antonyms of 'more split-second.