The antonym for the phrase 'more apical' is 'less apical.' To understand what 'apical' means, one must first understand that it is a medical term used to denote the top, highest, or uppermost point of an organ or body structure. Hence, when we say 'more apical,' we imply that there is another point or part of the organ or body structure that goes even higher or is more superior. So, if the opposite of 'more apical' is 'less apical,' it implies that the point or part in question moves down or is less superior than the current highest point of a body structure.