--- title: "BIP39 Word #390: cost — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/cost/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #390 00110000101 # cost — BIP39 word #390 "**cost**" is word #390 of the 2048 words in the official BIP39 English wordlist, between [correct](/bip39-word/correct/) and [cotton](/bip39-word/cotton/). In a seed phrase it stands for the 11-bit value `00110000101`, decimal index 389\. /kɒst/ · _noun:_ the amount of money needed to buy or do something [Russian](/ru/ "The BIP39 wordlist with Russian translations"): стоимость ## 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): [radar](/bip39-word/radar/)[idle](/bip39-word/idle/)[awful](/bip39-word/awful/)[camera](/bip39-word/camera/)[december](/bip39-word/december/)[cruise](/bip39-word/cruise/)[crawl](/bip39-word/crawl/)[coyote](/bip39-word/coyote/)[coral](/bip39-word/coral/)[couch](/bip39-word/couch/)[correct](/bip39-word/correct/) Position Hex Index 0x185 4-Letter Prefix cost ## About "cost" in BIP39 - "cost" has 4 letters, but the first three, **"cos"**, already identify it, because **"co"** also begins 40 other words, among them [coach](/bip39-word/coach/), [coast](/bip39-word/coast/), [coconut](/bip39-word/coconut/) and [code](/bip39-word/code/). Three letters are enough for only 604 of the 2048 words. - **"cost"** is unique only within the English list: it also begins costume in the [French list](/french/), costa in the [Spanish list](/spanish/), costante in the [Italian list](/italian/) and costela in the [Portuguese list](/portuguese/), so a four-letter backup should say which list it uses. ## Word #390 in the Other 9 BIP39 Wordlists [Czech](/czech/) hanopis [French](/french/) chouette [Italian](/italian/) conoscere [Japanese](/japanese/) ききて [Korean](/korean/) 대장 [Portuguese](/portuguese/) capricho [Spanish](/spanish/) choque [Traditional Chinese](/chinese-traditional/) 布 [Simplified Chinese](/chinese-simplified/) 布 ## Similar Words — Check Carefully During Recovery 3 BIP39 words differ from "cost" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [coast](/bip39-word/coast/)[host](/bip39-word/host/)[post](/bip39-word/post/) ## More BIP39 Words Starting with "C" [ #386 coral ](/bip39-word/coral/)[ #387 core ](/bip39-word/core/)[ #388 corn ](/bip39-word/corn/)[ #389 correct ](/bip39-word/correct/)[ #391 cotton ](/bip39-word/cotton/)[ #392 couch ](/bip39-word/couch/)[ #393 country ](/bip39-word/country/)[ #394 couple ](/bip39-word/couple/) [View all words starting with "C" ](/bip39-words/c/) ## Seed phrase, key and recovery guides - [How to Generate a BIP39 Seed Phrase with Dice, Step by Step](/seed-phrase-with-dice/) - [Derivation Path Explained: What m/44'/0'/0'/0/0 Means](/derivation-path/) - [Seed Phrase Scams: How Thieves Get Your Recovery Words](/seed-phrase-scams/) [ Full BIP39 Wordlist ](/)