Bip39 Ian Coleman. The passphrase just isn't selected with the predefined list of 2048 words – it might be any word or phrase you decide on. Mnemonics are representation of entropy. First step will involve earning a call concerning the amount entropy you think about safe for your personal operations. https://wavesocialmedia.com/story4349072/bip-39-https-linktr-ee-bip39-bip39-words-fundamentals-explained