---
title: "BIP39 Word #1165: muscle — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/muscle/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1165 10010001100 

# muscle — BIP39 word #1165

"**muscle**" is word #1165 of the 2048 words in the official BIP39 English wordlist, between [multiply](/bip39-word/multiply/) and [museum](/bip39-word/museum/). In a seed phrase it stands for the 11-bit value `10010001100`, decimal index 1164\. 

/ˈmʌsl/  · _noun:_ body tissue that tightens and relaxes to produce movement 

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

## 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):

[bag](/bip39-word/bag/)[spice](/bip39-word/spice/)[ranch](/bip39-word/ranch/)[light](/bip39-word/light/)[office](/bip39-word/office/)[night](/bip39-word/night/)[near](/bip39-word/near/)[mountain](/bip39-word/mountain/)[much](/bip39-word/much/)[mushroom](/bip39-word/mushroom/)[museum](/bip39-word/museum/) 

Position

Hex Index

0x48C

4-Letter Prefix

musc

## About "muscle" in BIP39

- "muscle" has 6 letters, but the first four, **"musc"**, already identify it, because **"mus"** also begins [museum](/bip39-word/museum/), [mushroom](/bip39-word/mushroom/), [music](/bip39-word/music/) and [must](/bip39-word/must/).
- The same spelling is in the [French BIP39 wordlist](/french/), but as word #1287 (index 1286), not #1165\. A wallet set to French reads "muscle" as **10100000110** instead of **10010001100**, and decodes index 1164 as "louve".
- **"musc"** is unique only within the English list: it also begins muscolo in the [Italian list](/italian/) and muscular in the [Portuguese list](/portuguese/), so a four-letter backup should say which list it uses.
- "muscle" appears in one of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vector #23 (word 10 of 18). Every official vector passes the [checksum checker](/bip39-checksum-checker/), and [How BIP39 works](/how-bip39-works/) shows how the entropy turns into such words.

Official test vector #23

[scissors](/bip39-word/scissors/) [invite](/bip39-word/invite/) [lock](/bip39-word/lock/) [maple](/bip39-word/maple/) [supreme](/bip39-word/supreme/) [raw](/bip39-word/raw/) [rapid](/bip39-word/rapid/) [void](/bip39-word/void/) [congress](/bip39-word/congress/) muscle [digital](/bip39-word/digital/) [elegant](/bip39-word/elegant/) [little](/bip39-word/little/) [brisk](/bip39-word/brisk/) [hair](/bip39-word/hair/) [mango](/bip39-word/mango/) [congress](/bip39-word/congress/) [clump](/bip39-word/clump/) 

## Word #1165 in the Other 9 BIP39 Wordlists

[Czech](/czech/) panenka 

[French](/french/) louve 

[Italian](/italian/) opinione 

[Japanese](/japanese/) だんぼう 

[Korean](/korean/) 열정 

[Portuguese](/portuguese/) limpador 

[Spanish](/spanish/) mojar 

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

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

## Similar Words — Check Carefully During Recovery

Read aloud, "muscle" /ˈmʌsl/ is one sound away from this word: 

[must /mʌst/](/bip39-word/must/) 

Words sharing the first three letters "mus":

[museum](/bip39-word/museum/)[mushroom](/bip39-word/mushroom/)[music](/bip39-word/music/)[must](/bip39-word/must/) 

## More BIP39 Words Starting with "M"

[ #1161 much ](/bip39-word/much/)[ #1162 muffin ](/bip39-word/muffin/)[ #1163 mule ](/bip39-word/mule/)[ #1164 multiply ](/bip39-word/multiply/)[ #1166 museum ](/bip39-word/museum/)[ #1167 mushroom ](/bip39-word/mushroom/)[ #1168 music ](/bip39-word/music/)[ #1169 must ](/bip39-word/must/) 

[View all words starting with "M" ](/bip39-words/m/) 

## Seed phrase, key and recovery guides

- [Test Your Wallet Backup: A Self-Audit of Your Seed Phrase](/hack-own-crypto-wallet/)
- [EVM Address Format Explained: Structure & Usage](/format-evm-addresses/)
- [Is a Seed Phrase Case Sensitive? BIP39 Words vs Passphrase](/is-seed-phrase-case-sensitivity-really-important/)

[ Full BIP39 Wordlist ](/)