--- title: "BIP39 Word #216: brain — Seed Phrase Mnemonic Word" url: "https://bip39-phrase.com/bip39-word/brain/" language: "en" updated: "2026-10-19T00:00:00+00:00" --- Word #216 00011010111 # brain — BIP39 word #216 "**brain**" is word #216 of the 2048 words in the official BIP39 English wordlist, between [bracket](/bip39-word/bracket/) and [brand](/bip39-word/brand/). In a seed phrase it stands for the 11-bit value `00011010111`, decimal index 215\. /breɪn/ · _noun:_ the organ inside the head that controls thought and feeling [Russian](/ru/ "The BIP39 wordlist with Russian translations"): мозг ## 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): [online](/bip39-word/online/)[foot](/bip39-word/foot/)[depend](/bip39-word/depend/)[april](/bip39-word/april/)[base](/bip39-word/base/)[bus](/bip39-word/bus/)[body](/bip39-word/body/)[brief](/bip39-word/brief/)[bounce](/bip39-word/bounce/)[boy](/bip39-word/boy/)[bracket](/bip39-word/bracket/) Position Hex Index 0x0D7 4-Letter Prefix brai ## About "brain" in BIP39 - "brain" has 5 letters, but the first four, **"brai"**, already identify it, because **"bra"** also begins [bracket](/bip39-word/bracket/), [brand](/bip39-word/brand/), [brass](/bip39-word/brass/) and [brave](/bip39-word/brave/). ## Word #216 in the Other 9 BIP39 Wordlists [Czech](/czech/) dcera [French](/french/) baudrier [Italian](/italian/) beffa [Japanese](/japanese/) えいよう [Korean](/korean/) 규정 [Portuguese](/portuguese/) aura [Spanish](/spanish/) bajar [Traditional Chinese](/chinese-traditional/) 邊 [Simplified Chinese](/chinese-simplified/) 边 ## Similar Words — Check Carefully During Recovery 3 BIP39 words differ from "brain" by just a single letter — the most common source of typos when a seed phrase is entered by hand: [grain](/bip39-word/grain/)[rain](/bip39-word/rain/)[train](/bip39-word/train/) Read aloud, "brain" /breɪn/ is one sound away from these 3 words: [brave /breɪv/](/bip39-word/brave/)[brown /braʊn/](/bip39-word/brown/)[crane /kreɪn/](/bip39-word/crane/) Words sharing the first three letters "bra": [bracket](/bip39-word/bracket/)[brand](/bip39-word/brand/)[brass](/bip39-word/brass/)[brave](/bip39-word/brave/) ## More BIP39 Words Starting with "B" [ #212 bounce ](/bip39-word/bounce/)[ #213 box ](/bip39-word/box/)[ #214 boy ](/bip39-word/boy/)[ #215 bracket ](/bip39-word/bracket/)[ #217 brand ](/bip39-word/brand/)[ #218 brass ](/bip39-word/brass/)[ #219 brave ](/bip39-word/brave/)[ #220 bread ](/bip39-word/bread/) [View all words starting with "B" ](/bip39-words/b/) ## Seed phrase, key and recovery guides - [Seed Phrase Formats by Network: BIP39 and the Exceptions](/seed-phrase-formats-by-network/) - [BIP39 vs BIP32 vs BIP44: How the Seed Standards Fit Together](/crypto-seed-standards-bip39-vs-bip32-vs-bip44/) - [How to Memorize a Seed Phrase: Color, Story and Palace Methods](/seed-phrase-memory/) [ Full BIP39 Wordlist ](/)