For words that only have three letters, there is no 4th letter. For instance with the word “add”, there won't be any much more letters Later on and therefore must be the word "increase". The word “addict” is during the BIP39 wordlist but you would've employed “addi” for “addict”. Meticulously https://mysocialname.com/story4052024/the-basic-principles-of-bip39-passphrase-generator