The phrase "run yourself down" refers to the act of negatively criticizing oneself or wearing oneself out physically or emotionally. It is important to expand your vocabulary and use other words or phrases in its place. Some synonyms for "run yourself down" include belittle oneself, criticize oneself harshly, denigrate oneself, put yourself down, diminish your self-worth, or devalue oneself. It's essential to have self-confidence and avoid running yourself down, but if you do, try to shift your mindset with self-affirmations or seek the help of a therapist or counselor. Remember to practice self-love and appreciate your unique qualities!