For words that only have three letters, there's no 4th letter. For instance with the word “increase”, there won't be any more letters afterwards and therefore should be the word "increase". The word “addict” is inside the BIP39 wordlist however , you might have used “addi” for “addict”. Should you https://socialbaskets.com/story4410680/top-latest-five-bip39-words-urban-news