--- title: "BIP39 Word #668: fat — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/fat/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #668 01010011011 # fat — BIP39 word #668 "**fat**" is word #668 of the 2048 words in the official BIP39 English wordlist, between [fashion](/bip39-word/fashion/) and [fatal](/bip39-word/fatal/). In a seed phrase it stands for the 11-bit value `01010011011`, decimal index 667\. /fæt/ · _adjective:_ having a lot of flesh on the body, or thick and wide [Russian](/ru/ "The BIP39 wordlist with Russian translations"): толстый ## Binary Representation Six 1-bits and five 0-bits; 462 of the 2048 indexes have exactly six 1-bits. One wrong bit turns it into (leftmost bit first): [square](/bip39-word/square/)[beach](/bip39-word/beach/)[inflict](/bip39-word/inflict/)[drop](/bip39-word/drop/)[fork](/bip39-word/fork/)[first](/bip39-word/first/)[fabric](/bip39-word/fabric/)[fame](/bip39-word/fame/)[fault](/bip39-word/fault/)[farm](/bip39-word/farm/)[fashion](/bip39-word/fashion/) Position Hex Index 0x29B 4-Letter Prefix fat ## About "fat" in BIP39 - All three letters of "fat" also begin longer words: [fatal](/bip39-word/fatal/), [father](/bip39-word/father/) and [fatigue](/bip39-word/fatigue/). So "fat" cannot be shortened, and a backup that keeps the first four letters of each word stores it as **"fat"** but fatal as **"fata"**. ## Word #668 in the Other 9 BIP39 Wordlists [Czech](/czech/) krajina [French](/french/) endroit [Italian](/italian/) florido [Japanese](/japanese/) こふん [Korean](/korean/) 볶음 [Portuguese](/portuguese/) ejetar [Spanish](/spanish/) explicar [Traditional Chinese](/chinese-traditional/) 承 [Simplified Chinese](/chinese-simplified/) 承 ## Similar Words — Check Carefully During Recovery 5 BIP39 words differ from "fat" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [cat](/bip39-word/cat/)[fan](/bip39-word/fan/)[fit](/bip39-word/fit/)[flat](/bip39-word/flat/)[hat](/bip39-word/hat/) Read aloud, "fat" /fæt/ is one sound away from these 3 words: [chat /ʧæt/](/bip39-word/chat/)[foot /fʊt/](/bip39-word/foot/)[that /ðæt/](/bip39-word/that/) Words sharing the first three letters "fat": [fatal](/bip39-word/fatal/)[father](/bip39-word/father/)[fatigue](/bip39-word/fatigue/) ## More BIP39 Words Starting with "F" [ #664 fancy ](/bip39-word/fancy/)[ #665 fantasy ](/bip39-word/fantasy/)[ #666 farm ](/bip39-word/farm/)[ #667 fashion ](/bip39-word/fashion/)[ #669 fatal ](/bip39-word/fatal/)[ #670 father ](/bip39-word/father/)[ #671 fatigue ](/bip39-word/fatigue/)[ #672 fault ](/bip39-word/fault/) [View all words starting with "F" ](/bip39-words/f/) ## Seed phrase, key and recovery guides - [Bitcoin Private Key Format: WIF, Base58 and Hex Explained](/private-key-btc/) - [How to Encrypt a Seed Phrase: AES, XOR and Steganography](/seed-phrase-encrypting-with-aes-xor-and-steganography/) - [Bitcoin Improvement Proposal (BIP): Process and Deployed BIP List](/bitcoin-improvement-proposal/) [ Full BIP39 Wordlist ](/)