1. the quality or state of being calm, peaceful, and undisturbed

Examples

• The placidness of the lake reflected the clear blue sky.
• Her placidness in stressful situations impressed her colleagues.
• The baby’s placidness made him easy to care for.
• The placidness of the countryside was a welcome change from city life.
• His natural placidness helped him remain composed during the crisis.
• The placidness of the evening was broken only by distant birdsong.