👉 Stiffens is a word that describes something that becomes more rigid or stiff. It generally refers to physical structures, such as bones, muscles, and joints, which are unable to move freely or flexibly due to an internal or external force. Stiffness can be caused by various factors, including overuse, repetitive motion, injury, or disease. In the context of healthcare, stiffens may refer to a condition where the body's tissues become more rigid or stiff due to chronic inflammation,