This is the 7350th most frequent Chinese word.
臻
To reach perfection; to attain.
In this sentence, "臻" is used to express the action of reaching or attaining a state of perfection.
这个产品的质量已经臻于完美。
The quality of this product has already reached perfection.
Here, "臻" denotes the process of reaching a state of refined excellence.
经过多年的努力，他的技术终于臻至精湛。
After years of effort, his skills finally attained excellence.
In this sentence, "臻" is used to indicate the aspiration for reaching a prosperous state.