Antonyms for the term "barely sufficient" include words like "abundant," "plentiful," and "sufficient." These words all suggest that there is more than enough of something, and therefore there is no need to worry about running out. Other antonyms for "barely sufficient" might include "ample," "plenty," and "satisfied." These words can all be used to describe a situation where there is no lack or shortage of something, making them the perfect antonyms for the phrase "barely sufficient." No matter which antonym you choose, it should convey a sense of abundance or surplus, which is the opposite of what "barely sufficient" suggests.