--- title: "BIP39 Word #724: foil — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/foil/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #724 01011010011 # foil — BIP39 word #724 "**foil**" is word #724 of the 2048 words in the official BIP39 English wordlist, between [fog](/bip39-word/fog/) and [fold](/bip39-word/fold/). In a seed phrase it stands for the 11-bit value `01011010011`, decimal index 723\. /fɔɪl/ · _noun:_ very thin sheets of metal used for wrapping food [Russian](/ru/ "The BIP39 wordlist with Russian translations"): фольга ## 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): [surprise](/bip39-word/surprise/)[bounce](/bip39-word/bounce/)[kidney](/bip39-word/kidney/)[engine](/bip39-word/engine/)[fame](/bip39-word/fame/)[fury](/bip39-word/fury/)[flash](/bip39-word/flash/)[fork](/bip39-word/fork/)[foot](/bip39-word/foot/)[focus](/bip39-word/focus/)[fog](/bip39-word/fog/) Position Hex Index 0x2D3 4-Letter Prefix foil ## About "foil" in BIP39 - "foil" has 4 letters, but the first three, **"foi"**, already identify it, because **"fo"** also begins 18 other words, among them [foam](/bip39-word/foam/), [focus](/bip39-word/focus/), [fog](/bip39-word/fog/) and [fold](/bip39-word/fold/). Three letters are enough for only 604 of the 2048 words. ## Word #724 in the Other 9 BIP39 Wordlists [Czech](/czech/) laik [French](/french/) esquiver [Italian](/italian/) gallina [Japanese](/japanese/) さくひん [Korean](/korean/) 비둘기 [Portuguese](/portuguese/) enxame [Spanish](/spanish/) finito [Traditional Chinese](/chinese-traditional/) 頻 [Simplified Chinese](/chinese-simplified/) 频 ## Similar Words — Check Carefully During Recovery 3 BIP39 words differ from "foil" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [boil](/bip39-word/boil/)[coil](/bip39-word/coil/)[oil](/bip39-word/oil/) Read aloud, "foil" /fɔɪl/ is one sound away from these 3 words: [fall /fɔːl/](/bip39-word/fall/)[feel /fiːl/](/bip39-word/feel/)[file /faɪl/](/bip39-word/file/) ## More BIP39 Words Starting with "F" [ #720 fly ](/bip39-word/fly/)[ #721 foam ](/bip39-word/foam/)[ #722 focus ](/bip39-word/focus/)[ #723 fog ](/bip39-word/fog/)[ #725 fold ](/bip39-word/fold/)[ #726 follow ](/bip39-word/follow/)[ #727 food ](/bip39-word/food/)[ #728 foot ](/bip39-word/foot/) [View all words starting with "F" ](/bip39-words/f/) ## Seed phrase, key and recovery guides - [Can You Guess a Seed Phrase? Probability and Real Risks](/can-you-guess-a-seed-phrase-probability-and-real-risks/) - [Crypto Inheritance: How to Pass On Your Seed Phrase](/crypto-inheritance/) - [Private Key Export: MetaMask, Trust Wallet, Ledger, Electrum](/convert-seed-phrase-to-private-key-guide/) [ Full BIP39 Wordlist ](/)