The antonyms for the word "over-reaches" include "underachieves," "falls short," "misses the mark," and "fails to attain." These antonyms imply insufficient effort or performance, which is the opposite of over-reaching, which implies an excessive or unrealistic goal. Underachieving means failing to meet expectations or performing below potential while falling short means failing to reach a specific target or objective. Missing the mark suggests not hitting a target or failing to achieve a goal due to poor aim. In contrast, failing to attain denotes the inability to reach a planned or desired outcome due to a lack of effort or skill. Overall, these antonyms provide a useful reference when seeking to describe the opposite of over-reaching.