Bip39 Mnemonic. The passphrase isn't chosen in the predefined list of 2048 words – it could be any word or phrase you choose. What constitutes a "very good wallet" is one which has distinct, very easy to access documentation on supported BIP expectations, derivation paths, and recovery procedures. This allows https://socialmediatotal.com/story4532358/bip39-passphrase-https-linktr-ee-bip39-bip39-words-an-overview