Bip39 Seed Phrase. The passphrase isn't picked from the predefined list of 2048 words – it might be any word or phrase you choose. BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked out. Every single word represents a range inside a binary sequence, as https://directmysocial.com/story3812474/bip39-https-linktr-ee-bip39-the-fact-about-bip39-wallets-that-no-one-is-suggesting