---
title: "BIP39 Word #671: fatigue — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/fatigue/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #671 01010011110 

# fatigue — BIP39 word #671

"**fatigue**" is word #671 of the 2048 words in the official BIP39 English wordlist, between [father](/bip39-word/father/) and [fault](/bip39-word/fault/). In a seed phrase it stands for the 11-bit value `01010011110`, decimal index 670\. 

/fəˈtiːg/  · _noun:_ extreme tiredness caused by physical or mental effort 

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

## 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):

[stable](/bip39-word/stable/)[because](/bip39-word/because/)[inherit](/bip39-word/inherit/)[duck](/bip39-word/duck/)[forward](/bip39-word/forward/)[fit](/bip39-word/fit/)[fade](/bip39-word/fade/)[fan](/bip39-word/fan/)[fashion](/bip39-word/fashion/)[fatal](/bip39-word/fatal/)[fault](/bip39-word/fault/) 

Position

Hex Index

0x29E

4-Letter Prefix

fati

## About "fatigue" in BIP39

- "fatigue" has 7 letters, but the first four, **"fati"**, already identify it, because **"fat"** also begins [fat](/bip39-word/fat/), [fatal](/bip39-word/fatal/) and [father](/bip39-word/father/).
- Its first letters also spell another BIP39 word, [fat](/bip39-word/fat/). Write "fatigue" out in full: cut short, it turns into a different valid word.
- The same spelling is in the [French BIP39 wordlist](/french/), but as word #797 (index 796), not #671\. A wallet set to French reads "fatigue" as **01100011100** instead of **01010011110**, and decodes index 670 as "enfance".
- **"fati"** is unique only within the English list: it also begins fatiga in the [Spanish list](/spanish/), faticare in the [Italian list](/italian/) and fatia in the [Portuguese list](/portuguese/), so a four-letter backup should say which list it uses.

## Word #671 in the Other 9 BIP39 Wordlists

[Czech](/czech/) kravata 

[French](/french/) enfance 

[Italian](/italian/) fobico 

[Japanese](/japanese/) こまかい 

[Korean](/korean/) 본부 

[Portuguese](/portuguese/) eleitor 

[Spanish](/spanish/) fábrica 

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

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

## Similar Words — Check Carefully During Recovery

Words sharing the first three letters "fat":

[fat](/bip39-word/fat/)[fatal](/bip39-word/fatal/)[father](/bip39-word/father/) 

## More BIP39 Words Starting with "F"

[ #667 fashion ](/bip39-word/fashion/)[ #668 fat ](/bip39-word/fat/)[ #669 fatal ](/bip39-word/fatal/)[ #670 father ](/bip39-word/father/)[ #672 fault ](/bip39-word/fault/)[ #673 favorite ](/bip39-word/favorite/)[ #674 feature ](/bip39-word/feature/)[ #675 february ](/bip39-word/february/) 

[View all words starting with "F" ](/bip39-words/f/) 

## Seed phrase, key and recovery guides

- [How to Memorize a Seed Phrase: Color, Story and Palace Methods](/seed-phrase-memory/)
- [What Is a Seed Phrase? How a Recovery Phrase Works](/recovery-seed-phrase-guide/)
- [What Is a Bitcoin Address and How Does It Work?](/what-is-a-bitcoin-address/)

[ Full BIP39 Wordlist ](/)