---
title: "BIP39 Word #31: adult — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/adult/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #31 00000011110 

# adult — BIP39 word #31

"**adult**" is word #31 of the 2048 words in the official BIP39 English wordlist, between [admit](/bip39-word/admit/) and [advance](/bip39-word/advance/). In a seed phrase it stands for the 11-bit value `00000011110`, decimal index 30\. 

/ˈædʌlt/  · _noun:_ a person or animal that is fully grown 

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

## 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):

[long](/bip39-word/long/)[duck](/bip39-word/duck/)[cat](/bip39-word/cat/)[because](/bip39-word/because/)[armed](/bip39-word/armed/)[amazing](/bip39-word/amazing/)[achieve](/bip39-word/achieve/)[actress](/bip39-word/actress/)[addict](/bip39-word/addict/)[adjust](/bip39-word/adjust/)[advance](/bip39-word/advance/) 

Position

Hex Index

0x01E

4-Letter Prefix

adul

## About "adult" in BIP39

- "adult" has 5 letters, but the first three, **"adu"**, already identify it, because **"ad"** also begins 8 other words, among them [adapt](/bip39-word/adapt/), [add](/bip39-word/add/), [addict](/bip39-word/addict/) and [address](/bip39-word/address/). Three letters are enough for only 604 of the 2048 words.
- **"adul"** is unique only within the English list: it also begins adulte in the [French list](/french/), adulto in the [Spanish list](/spanish/) and adulare in the [Italian list](/italian/), so a four-letter backup should say which list it uses.

## Word #31 in the Other 9 BIP39 Wordlists

[Czech](/czech/) baculka 

[French](/french/) aciduler 

[Italian](/italian/) affranto 

[Japanese](/japanese/) あふれる 

[Korean](/korean/) 감각 

[Portuguese](/portuguese/) acima 

[Spanish](/spanish/) acusar 

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

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

## More BIP39 Words Starting with "A"

[ #27 addict ](/bip39-word/addict/)[ #28 address ](/bip39-word/address/)[ #29 adjust ](/bip39-word/adjust/)[ #30 admit ](/bip39-word/admit/)[ #32 advance ](/bip39-word/advance/)[ #33 advice ](/bip39-word/advice/)[ #34 aerobic ](/bip39-word/aerobic/)[ #35 affair ](/bip39-word/affair/) 

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

## Seed phrase, key and recovery guides

- [How to Restore a Wallet From a Seed Phrase: Step by Step](/restore-wallet-from-seed-phrase/)
- [xpub, ypub and zpub: Extended Public Keys Explained](/xpub-ypub-zpub/)
- [SLIP-39 vs BIP39: Shamir Backup and 20-Word Shares Explained](/slip39-vs-bip39/)

[ Full BIP39 Wordlist ](/)