Un-bracing means something that is not refreshing or invigorating. The antonyms for un-bracing are words that describe something that is energizing, revitalizing, and bracing. Refreshing, reviving, stimulating, invigorating, and reinvigorating are all ideal antonyms for un-bracing. Refreshing will describe something that is still, cool, and invigorating, while reviving will mean to restore life or vigor to something. Stimulating will suggest something that is exciting or energizing, while invigorating means something that gives renewed energy or strength. Lastly, reinvigorating will suggest something that strengthens, reinforces, or reenergizes. These words are all ideal antonyms to un-bracing, which denotes something dull and unexciting.