--- title: "BIP39 Word #1999: what — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/what/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #1999 11111001110 # what — BIP39 word #1999 "**what**" is word #1999 of the 2048 words in the official BIP39 English wordlist, between [whale](/bip39-word/whale/) and [wheat](/bip39-word/wheat/). In a seed phrase it stands for the 11-bit value `11111001110`, decimal index 1998\. /wɒt/ · _pronoun:_ used to ask about a thing, or to mean the thing that [Russian](/ru/ "The BIP39 wordlist with Russian translations"): что ## Binary Representation Eight 1-bits and three 0-bits; 165 of the 2048 indexes have exactly eight 1-bits. One wrong bit turns it into (leftmost bit first): [keep](/bip39-word/keep/)[right](/bip39-word/right/)[supply](/bip39-word/supply/)[truth](/bip39-word/truth/)[vault](/bip39-word/vault/)[worry](/bip39-word/worry/)[wink](/bip39-word/wink/)[web](/bip39-word/web/)[welcome](/bip39-word/welcome/)[wet](/bip39-word/wet/)[wheat](/bip39-word/wheat/) Position Hex Index 0x7CE 4-Letter Prefix what ## About "what" in BIP39 - It takes all four letters to identify "what": **"wha"** also begins [whale](/bip39-word/whale/). ## Word #1999 in the Other 9 BIP39 Wordlists [Czech](/czech/) zkratka [French](/french/) vexant [Italian](/italian/) vigilia [Japanese](/japanese/) りりく [Korean](/korean/) 홍차 [Portuguese](/portuguese/) vespa [Spanish](/spanish/) vida [Traditional Chinese](/chinese-traditional/) 戈 [Simplified Chinese](/chinese-simplified/) 戈 ## Similar Words — Check Carefully During Recovery 4 BIP39 words differ from "what" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [chat](/bip39-word/chat/)[hat](/bip39-word/hat/)[that](/bip39-word/that/)[wheat](/bip39-word/wheat/) Read aloud, "what" /wɒt/ is one sound away from these 4 words: [wait /weɪt/](/bip39-word/wait/)[want /wɒnt/](/bip39-word/want/)[wash /wɒʃ/](/bip39-word/wash/)[wet /wɛt/](/bip39-word/wet/) Words sharing the first three letters "wha": [whale](/bip39-word/whale/) ## More BIP39 Words Starting with "W" [ #1995 welcome ](/bip39-word/welcome/)[ #1996 west ](/bip39-word/west/)[ #1997 wet ](/bip39-word/wet/)[ #1998 whale ](/bip39-word/whale/)[ #2000 wheat ](/bip39-word/wheat/)[ #2001 wheel ](/bip39-word/wheel/)[ #2002 when ](/bip39-word/when/)[ #2003 where ](/bip39-word/where/) [View all words starting with "W" ](/bip39-words/w/) ## Seed phrase, key and recovery guides - [BIP85: Derive Many Seed Phrases From One Seed](/bip85/) - [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/) [ Full BIP39 Wordlist ](/)