stiffness

This term describes a resistance to deformation or a lack of fluidity, whether physical or behavioral. In a material sense, it refers to the structural integrity and rigidity of an object, often implying a lack of pliability. When applied to the human body, it denotes a physiological state of tension or restricted movement, typically associated with medical conditions, aging, or sudden temperature drops. In a social context, it characterizes a formal or strained demeanor that lacks warmth and spontaneity, often signaling discomfort or hostility.