For words that only have 3 letters, there isn't a 4th letter. For instance with the word “increase”, there aren't any a lot more letters afterwards and therefore should be the word "insert". The word “addict” is inside the BIP39 wordlist but you would've used “addi” for “addict”. Meticulously critique https://one-bookmark.com/story18757070/an-unbiased-view-of-bip39-seed-phrase-github