unruffled

This term describes a state of absolute stillness, whether physical or emotional. When applied to a person, it suggests a level of poise that borders on the impenetrable, implying that external stressors have failed to penetrate their internal calm. It is more evocative than simply saying someone is calm, as it suggests a specific resistance to being disturbed.

In a physical sense, the word evokes a mirror-like quality, typically used for water or fabric. It describes a surface that is perfectly smooth and devoid of any ripples or creases, creating a visual sense of serenity and undisturbed order.