The phrase "knocked bottom out of" implies a significant decrease or complete elimination of something. Antonyms for this phrase could include "boosted," "strengthened," "reinforced," "energized," or "promoted." These words suggest an increase in intensity or effectiveness, rather than a decrease. For example, one could say "our marketing campaign really boosted sales" or "the new hires have strengthened our team." In contrast, saying "the pandemic has knocked the bottom out of our revenue" conveys a sense of loss or decline. Antonyms such as "boosted" or "strengthened" provide a more positive perspective and encourage a focus on growth and improvement.