During a chilly winter afternoon, Clara sat by the window, watching the snowflakes gracefully descend from the sky. Each tiny flake was unique, shimmering in the light like little diamonds. As she sipped her hot cocoa, she felt a sense of peace wash over her. This moment made her appreciate the beauty of nature and the warmth of home. Clara knew that winter could be harsh, but she relished its serene moments.

In this context, which word best describes what the word 'serene' means?