"Wreaked havoc on" refers to causing extensive damage or disruption. Antonyms for this phrase could include "brought order to," "restored peace," "repaired damage," or "ameliorated chaos." By using these opposite terms, it suggests a sense of control, stability, and a sense of balance. Examples of these antonyms in a sentence are "The new government brought order to the chaotic city," or "The cleaning crew repaired the damage and restored peace to the previously disrupted office." Therefore, having access to antonyms allows for a more comprehensive understanding and a broader range of expression in communication, ultimately ensuring effective communication between the speaker and the listener.