--- title: "BIP39 Word #1169: must — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/must/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #1169 10010010000 # must — BIP39 word #1169 "**must**" is word #1169 of the 2048 words in the official BIP39 English wordlist, between [music](/bip39-word/music/) and [mutual](/bip39-word/mutual/). In a seed phrase it stands for the 11-bit value `10010010000`, decimal index 1168\. /mʌst/ · _verb:_ to be required to do something, or to be certain [Russian](/ru/ "The BIP39 wordlist with Russian translations"): должен ## Binary Representation Three 1-bits and eight 0-bits; 165 of the 2048 indexes have exactly three 1-bits. One wrong bit turns it into (leftmost bit first): [bamboo](/bip39-word/bamboo/)[spirit](/bip39-word/spirit/)[rare](/bip39-word/rare/)[link](/bip39-word/link/)[old](/bip39-word/old/)[noodle](/bip39-word/noodle/)[mosquito](/bip39-word/mosquito/)[narrow](/bip39-word/narrow/)[myth](/bip39-word/myth/)[myself](/bip39-word/myself/)[mutual](/bip39-word/mutual/) Position Hex Index 0x490 4-Letter Prefix must ## About "must" in BIP39 - It takes all four letters to identify "must": **"mus"** also begins [muscle](/bip39-word/muscle/), [museum](/bip39-word/museum/), [mushroom](/bip39-word/mushroom/) and [music](/bip39-word/music/). ## Word #1169 in the Other 9 BIP39 Wordlists [Czech](/czech/) panstvo [French](/french/) lucratif [Italian](/italian/) ordine [Japanese](/japanese/) だんろ [Korean](/korean/) 엽서 [Portuguese](/portuguese/) liquidez [Spanish](/spanish/) momento [Traditional Chinese](/chinese-traditional/) 遭 [Simplified Chinese](/chinese-simplified/) 遭 ## Similar Words — Check Carefully During Recovery 2 BIP39 words differ from "must" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [dust](/bip39-word/dust/)[just](/bip39-word/just/) Read aloud, "must" /mʌst/ is one sound away from this word: [muscle /ˈmʌsl/](/bip39-word/muscle/) Words sharing the first three letters "mus": [muscle](/bip39-word/muscle/)[museum](/bip39-word/museum/)[mushroom](/bip39-word/mushroom/)[music](/bip39-word/music/) ## More BIP39 Words Starting with "M" [ #1165 muscle ](/bip39-word/muscle/)[ #1166 museum ](/bip39-word/museum/)[ #1167 mushroom ](/bip39-word/mushroom/)[ #1168 music ](/bip39-word/music/)[ #1170 mutual ](/bip39-word/mutual/)[ #1171 myself ](/bip39-word/myself/)[ #1172 mystery ](/bip39-word/mystery/)[ #1173 myth ](/bip39-word/myth/) [View all words starting with "M" ](/bip39-words/m/) ## Seed phrase, key and recovery guides - [How to View & Recover Bitcoin Wallet.dat Content](/how-to-view-and-recover-bitcoin-wallet-dat-content/) - [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/) [ Full BIP39 Wordlist ](/)