---
title: "BIP39 Word #126: autumn — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/autumn/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #126 00001111101 

# autumn — BIP39 word #126

"**autumn**" is word #126 of the 2048 words in the official BIP39 English wordlist, between [auto](/bip39-word/auto/) and [average](/bip39-word/average/). In a seed phrase it stands for the 11-bit value `00001111101`, decimal index 125\. 

/ˈɔːtəm/  · _noun:_ the season between summer and winter when leaves fall 

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

## 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):

[moral](/bip39-word/moral/)[exile](/bip39-word/exile/)[cook](/bip39-word/cook/)[cabbage](/bip39-word/cabbage/)[amateur](/bip39-word/amateur/)[arm](/bip39-word/arm/)[asset](/bip39-word/asset/)[attitude](/bip39-word/attitude/)[august](/bip39-word/august/)[avocado](/bip39-word/avocado/)[auto](/bip39-word/auto/) 

Position

Hex Index

0x07D

4-Letter Prefix

autu

## About "autumn" in BIP39

- "autumn" has 6 letters, but the first four, **"autu"**, already identify it, because **"aut"** also begins [author](/bip39-word/author/) and [auto](/bip39-word/auto/).
- **"autu"** is unique only within the English list: it also begins autunno in the [Italian list](/italian/) and autuar in the [Portuguese list](/portuguese/), so a four-letter backup should say which list it uses.

## Word #126 in the Other 9 BIP39 Wordlists

[Czech](/czech/) bunda 

[French](/french/) appareil 

[Italian](/italian/) araldica 

[Japanese](/japanese/) いやがる 

[Korean](/korean/) 골목 

[Portuguese](/portuguese/) amolador 

[Spanish](/spanish/) apodo 

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

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

## Similar Words — Check Carefully During Recovery

Read aloud, "autumn" /ˈɔːtəm/ is one sound away from these 3 words: 

[atom /ˈætəm/](/bip39-word/atom/)[awesome /ˈɔːsəm/](/bip39-word/awesome/)[item /ˈaɪtəm/](/bip39-word/item/) 

Words sharing the first three letters "aut":

[author](/bip39-word/author/)[auto](/bip39-word/auto/) 

## More BIP39 Words Starting with "A"

[ #122 august ](/bip39-word/august/)[ #123 aunt ](/bip39-word/aunt/)[ #124 author ](/bip39-word/author/)[ #125 auto ](/bip39-word/auto/)[ #127 average ](/bip39-word/average/)[ #128 avocado ](/bip39-word/avocado/)[ #129 avoid ](/bip39-word/avoid/)[ #130 awake ](/bip39-word/awake/) 

[View all words starting with "A" ](/bip39-words/a/) 

## Seed phrase, key and recovery guides

- [Why You Should Never Create Your Own Seed Phrase](/why-you-should-never-create-your-own-seed-phrase/)
- [12 vs 24 Word Seed Phrase: Which Is More Secure?](/12-vs-24-word-seed-phrase/)
- [BIP 157 Client-Side Block Filtering: Compact Filters Explained](/bip-157-client-side-block-filtering/)

[ Full BIP39 Wordlist ](/)