---
title: "BIP39 Word #1804: thumb — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/thumb/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1804 11100001011 

# thumb — BIP39 word #1804

"**thumb**" is word #1804 of the 2048 words in the official BIP39 English wordlist, between [throw](/bip39-word/throw/) and [thunder](/bip39-word/thunder/). In a seed phrase it stands for the 11-bit value `11100001011`, decimal index 1803\. 

/θʌm/  · _noun:_ the short thick finger on the side of the hand 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): большой палец 

## 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):

[gesture](/bip39-word/gesture/)[pause](/bip39-word/pause/)[scrap](/bip39-word/scrap/)[vapor](/bip39-word/vapor/)[truly](/bip39-word/truly/)[tornado](/bip39-word/tornado/)[toddler](/bip39-word/toddler/)[there](/bip39-word/there/)[tiger](/bip39-word/tiger/)[thrive](/bip39-word/thrive/)[throw](/bip39-word/throw/) 

Position

Hex Index

0x70B

4-Letter Prefix

thum

## About "thumb" in BIP39

- "thumb" has 5 letters, but the first four, **"thum"**, already identify it, because **"thu"** also begins [thunder](/bip39-word/thunder/).

## Word #1804 in the Other 9 BIP39 Wordlists

[Czech](/czech/) vedro 

[French](/french/) souvenir 

[Italian](/italian/) tabacco 

[Japanese](/japanese/) まなぶ 

[Korean](/korean/) 탤런트 

[Portuguese](/portuguese/) sorrir 

[Spanish](/spanish/) taquilla 

[Traditional Chinese](/chinese-traditional/) 肌 

[Simplified Chinese](/chinese-simplified/) 肌 

## Similar Words — Check Carefully During Recovery

Read aloud, "thumb" /θʌm/ is one sound away from these 3 words: 

[come /kʌm/](/bip39-word/come/)[dumb /dʌm/](/bip39-word/dumb/)[theme /θiːm/](/bip39-word/theme/) 

Words sharing the first three letters "thu":

[thunder](/bip39-word/thunder/) 

## More BIP39 Words Starting with "T"

[ #1800 thought ](/bip39-word/thought/)[ #1801 three ](/bip39-word/three/)[ #1802 thrive ](/bip39-word/thrive/)[ #1803 throw ](/bip39-word/throw/)[ #1805 thunder ](/bip39-word/thunder/)[ #1806 ticket ](/bip39-word/ticket/)[ #1807 tide ](/bip39-word/tide/)[ #1808 tiger ](/bip39-word/tiger/) 

[View all words starting with "T" ](/bip39-words/t/) 

## Seed phrase, key and recovery guides

- [BIP39 Passphrase: How the 25th Word Creates a Hidden Wallet](/bip39-passphrase/)
- [Is My Seed Phrase Compromised? Signs and What to Do Next](/bip39-seed-phrase-compromise/)
- [BIP 32 Explained: Hierarchical Deterministic Wallets](/bip-32/)

[ Full BIP39 Wordlist ](/)