This is the 3793rd most frequent Chinese word.
链
Chain.
The word '链' refers to a jewelry chain in this context.
这条金链子非常高贵。
This gold chain is very elegant.
Here '链' is used as part of the term '区块链' (blockchain), referring to a series of connected blocks in computer science.
区块链技术正在改变我们的经济。
Blockchain technology is transforming our economy.
In this sentence, '链' describes a chain made of metal used for locking or securing.