The antonyms for the word "more vitiated" are strengthened, improved, purified, and enhanced. Strengthened implies that something has been made stronger or more durable than before. Improved indicates an increase in quality or effectiveness. Purified refers to the removal of impurities to make something pure or clean. Enhanced suggests an improvement in quality, quantity, or value that makes something more attractive or desirable. Using these antonyms can help convey the opposite meaning to "more vitiated," which implies that something has become tainted, weakened, or corrupted. It's essential to choose the right word to express the intended meaning and avoid misunderstandings.