--- title: "BIP39 Word #1092: mask — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/mask/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #1092 10001000011 # mask — BIP39 word #1092 "**mask**" is word #1092 of the 2048 words in the official BIP39 English wordlist, between [marriage](/bip39-word/marriage/) and [mass](/bip39-word/mass/). In a seed phrase it stands for the 11-bit value `10001000011`, decimal index 1091\. /mɑːsk/ · _noun:_ a covering worn over the face to hide or protect it [Russian](/ru/ "The BIP39 wordlist with Russian translations"): маска ## Binary Representation Four 1-bits and seven 0-bits; 330 of the 2048 indexes have exactly four 1-bits. One wrong bit turns it into (leftmost bit first): [anchor](/bip39-word/anchor/)[silent](/bip39-word/silent/)[position](/bip39-word/position/)[observe](/bip39-word/observe/)[lesson](/bip39-word/lesson/)[midnight](/bip39-word/midnight/)[media](/bip39-word/media/)[maximum](/bip39-word/maximum/)[material](/bip39-word/material/)[market](/bip39-word/market/)[marriage](/bip39-word/marriage/) Position Hex Index 0x443 4-Letter Prefix mask ## About "mask" in BIP39 - It takes all four letters to identify "mask": **"mas"** also begins [mass](/bip39-word/mass/) and [master](/bip39-word/master/). - **"mask"** is unique only within the English list: it also begins maskot in the [Czech list](/czech/), so a four-letter backup should say which list it uses. ## Word #1092 in the Other 9 BIP39 Wordlists [Czech](/czech/) okruh [French](/french/) jubiler [Italian](/italian/) negozio [Japanese](/japanese/) たおす [Korean](/korean/) 양배추 [Portuguese](/portuguese/) jazida [Spanish](/spanish/) manta [Traditional Chinese](/chinese-traditional/) 陰 [Simplified Chinese](/chinese-simplified/) 阴 ## Similar Words — Check Carefully During Recovery 3 BIP39 words differ from "mask" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [ask](/bip39-word/ask/)[mass](/bip39-word/mass/)[task](/bip39-word/task/) Words sharing the first three letters "mas": [mass](/bip39-word/mass/)[master](/bip39-word/master/) ## More BIP39 Words Starting with "M" [ #1088 margin ](/bip39-word/margin/)[ #1089 marine ](/bip39-word/marine/)[ #1090 market ](/bip39-word/market/)[ #1091 marriage ](/bip39-word/marriage/)[ #1093 mass ](/bip39-word/mass/)[ #1094 master ](/bip39-word/master/)[ #1095 match ](/bip39-word/match/)[ #1096 material ](/bip39-word/material/) [View all words starting with "M" ](/bip39-words/m/) ## Seed phrase, key and recovery guides - [TON Seed Phrase: 24-Word Format vs 12-Word BIP39 Phrases](/seed-phrase-format-for-ton-wallets/) - [Recover Lost Bitcoin: Find Wallet Backups and Seed Phrases](/recover-lost-bitcoin-find-wallet-backups/) - [Seed Phrase vs Private Key: What's the Difference?](/seed-phrase-vs-private-key/) [ Full BIP39 Wordlist ](/)