The word "un-tainted" means pure, uncontaminated or unspoilt. Antonyms for this word would include tainted, impure, spoiled, corrupted or polluted. These words describe something that has been contaminated or affected negatively. For example, if we say "this water is tainted", it means that the water is contaminated and not safe to drink. Similarly, if we say "his reputation is spoiled", it means that his reputation has been negatively affected by some action or event. Antonyms help to expand our vocabulary and provide us with a range of words to choose from, making our communication more precise and effective.