This is the 1627th most frequent Chinese word.
瑞
"瑞" means "auspicious" or "propitious."
In this sentence, 瑞 (ruì) is part of the proper noun 瑞士 (Switzerland), serving as a meaningful and integral part of the name.
瑞士的风景非常美丽。
The scenery in Switzerland is very beautiful.
Here, 瑞 (ruì) conveys a sense of auspiciousness and positive symbolism in the phrase 吉瑞 (auspicious).
春天的到来带来了吉瑞之气。
The arrival of spring brings auspicious energy.
In this case, 瑞 (ruì) is used figuratively to suggest excellence or praiseworthiness in informal usage.