Bip39 Passphrase Generator. The passphrase is just not picked through the predefined list of 2048 words – it could be any word or phrase you choose. What constitutes a "very good wallet" is one that has obvious, straightforward to entry documentation on supported BIP specifications, derivation paths, and Restoration processes. https://iowa-bookmarks.com/story14441443/bip-39-https-linktr-ee-bip39-a-review-of-bip39-word-list-pdf