Tautnesses, meaning tension or tightness, does not have official antonyms as it is a rather specific term. However, some words that can be opposite in meaning or relate to the release of tension include relaxation, looseness, flexibility, limpness, slackness, ease, and calmness. The opposite of tautnesses in a physical sense could be a state of floppiness or softness. Emotionally, the opposite could be calmness or tranquility. Understanding antonyms for words is important as it helps us to expand our vocabulary and language skills, allowing us to communicate more effectively and express ourselves in different ways.