Bip39 Dictionary. The passphrase isn't selected from the predefined list of 2048 words – it can be any word or phrase you choose. Anybody else who discovers the phrase can steal the bitcoins. It should be stored secret, one example is it have to not be typed into any Internet https://funbookmarking.com/story18620140/bip39-passphrase-https-linktr-ee-bip39-the-best-side-of-bip39