For words that have only 3 letters, there's no 4th letter. For instance with the word “increase”, there aren't any more letters Later on and thus needs to be the word "incorporate". The word “addict” is within the BIP39 wordlist however, you would have applied “addi” for “addict”. gravity trophy https://zenwriting.net/keenanctdp/h1-b-unlocking-the-power-of-bip39-a-comprehensive-look-at-word-lists-and