The phrase "more sufficing" means that something is sufficient or satisfies a particular need. Antonyms for this phrase could include inadequate, insufficient, unsatisfactory, deficient, lacking, or incomplete. If something is inadequate, it falls short of what is needed or expected. Similarly, if something is insufficient, it is not enough to meet a requirement. Something can also be unsatisfactory if it fails to meet expectations or doesn't bring satisfaction. Something that is deficient or lacking is also not enough, and something that is incomplete is not finished or whole. These antonyms provide various ways to describe something that does not sufficiently fulfill a need or requirement.