The antonyms for the word "un-dimmed" would be "dimmed," "faded," "dull," "obscured," or "clouded." These words suggest a lack of brightness or clarity, indicating that something may not be as vivid or clear as it once was. For example, a dimmed light bulb may not emit as much light as it once did, while a faded photograph may not be as sharp or bright as it once appeared. Similarly, a dull or obscure idea may lack the clarity or impact needed to be effective. Understanding antonyms for common words like "un-dimmed" can help us communicate more effectively, both in speaking and writing.