Bip39 first 4 letters https://gravatar.com/sparklyusually6089a4f337 As it is possible to see, these are frequent words that are easy to store or recall. It's not advised to remember them, however it is considerably easier than remembering a 64-character-extensive string of random quantities and letters. The BIP39 word list is a set https://bip39marco.mystrikingly.com/