The phrase "hardly enough" expresses a sense of inadequacy or insufficiency. The antonyms for this phrase could be "more than enough," "ample," "sufficient," "abundant," or "plentiful." These words signify that there is an abundant amount of something available, which is the exact opposite of "hardly enough." They suggest that there is plenty of something to go around, and that there is no shortage or deficiency. When we use the antonyms of "hardly enough," we are indicating that we have more than we need, and that we're not lacking in resources, skills, or knowledge.