Bip39 Seed Phrase. The passphrase is just not picked through the predefined list of 2048 words – it can be any word or phrase you choose. What constitutes a "very good wallet" is one which has clear, straightforward to accessibility documentation on supported BIP criteria, derivation paths, and recovery processes. https://wisesocialsmedia.com/story4810293/bip39-list-https-linktr-ee-bip39-a-review-of-bip39-generator