Bip39 Words. The passphrase is just not picked with the predefined list of 2048 words – it may be any word or phrase you select. Any person else who discovers the phrase can steal the bitcoins. It should be retained magic formula, for example it have to not be typed https://userbookmark.com/story18620991/ian-coleman-bip39-https-linktr-ee-bip39-5-essential-elements-for-bip-39