Bip39 English Word List By way of example, take the word “accident” for example. Its very first 4 letters are “acci”. In case you look at the BIP39 word list, you will note that no other word begins with “acci”. Anybody else who discovers the phrase can steal the bitcoins. https://bookmarkfame.com/story18392996/bip39-python-indicators-on-bip39-phrase-you-should-know