The word "lowests" refers to the superlative form of "low" and means the least in height, depth, rank, or quality. Antonyms of "lowests" would be words that convey the opposite meaning such as "highest", "topmost", "utmost", "supreme", or "maximum". These words imply the greatest degree, position, or value that can be reached. Other antonyms of "lowests" may include "excellent", "premium", "elite", or "superior". These words refer to quality and suggest high standards and superior performance. In summary, the antonyms of "lowests" are words that convey the highest level, position, or quality.