Generating A K Expression A BIP39 mnemonic sentence is a list of words (most commonly twelve or 24) that we are able to connect with far more effectively than other people that are not words (bits and quantities and the like). BIP39's reason in introducing the use of mnemonic words https://bookmarkextent.com/story20379947/is-bip39-secure-not-known-factual-statements-about-bip39-word-list