The antonym for the word "bi-sections" could be "non-division" or "whole". Bi-sections refer to dividing something into two equal parts, so the opposite of that would be keeping things undivided or whole. Another possible antonym to consider is "unilateralism", which signifies unequal division, or dividing something unequally. So, while bi-sections are a way of dividing things symmetrically, non-division or whole, and unilateralism depict keeping things undivided or dividing them unequally. Having a good understanding of antonyms can help expand your vocabulary and enhance your communication skills, both of which can be advantageous in various situations.