The phrase "didst a number on" means to cause damage, harm, or trouble. Antonyms for this phrase could include actions or words that promote healing, improvement, or resolution. Some examples of antonyms for "didst a number on" could be heal, repair, fix, restore, mend, reconcile, resolve, or settle. These words suggest actions that aim to remedy a negative situation or restore something to its original state. Instead of causing harm or damage, these antonyms promote positive change and growth. It's important to choose words carefully to effectively communicate the opposite meaning of a phrase like "didst a number on.