The placid lake reflected the mountains perfectly at dawn.

The placidness of the lake at dawn calmed everyone's restless thoughts.

Even amid the noisy marketplace, his placidity made others feel at ease.

Even amid the chaos of the festival, the old temple's placidities comforted the weary travelers.

The lake looked placider at dawn than it had at midnight, its surface mirroring the pale sky.

The swan glided placidly across the moonlit lake.

Among all the lakes we visited that summer, Mirror Lake was the placidest, reflecting the sky like a polished mirror.