A wallet is a piece of software which generates and stores public and private keys, allowing users to send, receive, and store bitcoin.

Watch-only is a term used to describe wallets which store public keys but do not store or use private keys.

A weight unit is the unit used to measure the size of transactions and blocks as of the SegWit upgrade. Weight units are abbreviated as ‘wu’.

A whitepaper introduces a new idea or topic for discussion. The Bitcoin whitepaper introduced Bitcoin as a “Peer-to-peer electronic cash system” on October 31, 2008.

The Witness Script contains the signatures and appropriate script which together unlock bitcoin sent in a SegWit transaction.ohh