Web3: A concept referring to the third era of the internet, where decentralized protocols and blockchain technologies enable greater user control and ownership of data, applications, and digital assets. 

Whale: A term used to describe an individual or entity that holds a large amount of cryptocurrency. Whales have the potential to influence market prices due to the significant impact their transactions can have. 

Witness (Segregated Witness): A protocol upgrade implemented on certain blockchains, such as Bitcoin and Litecoin. Witness segregates transaction data and signature data, aiming to improve scalability and reduce transaction malleability. 

Wrapped Token: A token created on one blockchain that represents another asset from a different blockchain. This is often done to enable the use of assets on different platforms, such as wrapping Ethereum tokens to use them on the Binance Smart Chain. 

Whitelist: A list of approved participants who are allowed to take part in a token sale or participate in a specific blockchain network. Being on the whitelist typically requires users to complete certain criteria or comply with specific regulations. 

Wash Trading: An illicit trading practice where an investor simultaneously sells and buys the same financial instruments to create misleading or artificial activity in the market. 

Witness Node: In blockchain networks, particularly those using delegated proof-of-stake (DPoS) consensus, a witness node is responsible for validating and confirming transactions. Witness nodes are often elected by token holders.