--- title: "BIP39 Word #904: ill — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/ill/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #904 01110000111 # ill — BIP39 word #904 "**ill**" is word #904 of the 2048 words in the official BIP39 English wordlist, between [ignore](/bip39-word/ignore/) and [illegal](/bip39-word/illegal/). In a seed phrase it stands for the 11-bit value `01110000111`, decimal index 903\. /ɪl/ · _adjective:_ suffering from a disease or not feeling well [Russian](/ru/ "The BIP39 wordlist with Russian translations"): больной ## 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): [valley](/bip39-word/valley/)[couch](/bip39-word/couch/)[extend](/bip39-word/extend/)[genius](/bip39-word/genius/)[jump](/bip39-word/jump/)[insane](/bip39-word/insane/)[indicate](/bip39-word/indicate/)[impose](/bip39-word/impose/)[idea](/bip39-word/idea/)[idle](/bip39-word/idle/)[ignore](/bip39-word/ignore/) Position Hex Index 0x387 4-Letter Prefix ill ## About "ill" in BIP39 - All three letters of "ill" also begin longer words: [illegal](/bip39-word/illegal/) and [illness](/bip39-word/illness/). So "ill" cannot be shortened, and a backup that keeps the first four letters of each word stores it as **"ill"** but illegal as **"ille"**. ## Word #904 in the Other 9 BIP39 Wordlists [Czech](/czech/) nabourat [French](/french/) génie [Italian](/italian/) leone [Japanese](/japanese/) すばらしい [Korean](/korean/) 수건 [Portuguese](/portuguese/) garfo [Spanish](/spanish/) igual [Traditional Chinese](/chinese-traditional/) 秋 [Simplified Chinese](/chinese-simplified/) 秋 ## Similar Words — Check Carefully During Recovery 4 BIP39 words differ from "ill" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [all](/bip39-word/all/)[hill](/bip39-word/hill/)[pill](/bip39-word/pill/)[will](/bip39-word/will/) Read aloud, "ill" /ɪl/ is one sound away from these 2 words: [aisle /aɪl/](/bip39-word/aisle/)[oil /ɔɪl/](/bip39-word/oil/) Words sharing the first three letters "ill": [illegal](/bip39-word/illegal/)[illness](/bip39-word/illness/) ## More BIP39 Words Starting with "I" [ #900 idea ](/bip39-word/idea/)[ #901 identify ](/bip39-word/identify/)[ #902 idle ](/bip39-word/idle/)[ #903 ignore ](/bip39-word/ignore/)[ #905 illegal ](/bip39-word/illegal/)[ #906 illness ](/bip39-word/illness/)[ #907 image ](/bip39-word/image/)[ #908 imitate ](/bip39-word/imitate/) [View all words starting with "I" ](/bip39-words/i/) ## 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 ](/)