Un-strengthens is a term which means to weaken, deteriorate or make something less strong or powerful. Its antonyms would refer to words that convey an opposite meaning, implying strength, growth or empowerment. A few examples of antonyms for un-strengthens include the words strengthen, fortify, encourage, empower, enhance, invigorate and vitalize. These words imply the concept of developing, improving and reinforcing something, whether it be physical or emotional. Antonyms carry a strong communicative value, helping to convey the exact meaning of a sentence or expression. By using antonyms, a sentence can become more precise and authoritative, making it easier to understand for readers.