---
title: "BIP39 Word #2: ability — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/ability/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #2 00000000001 

# ability — BIP39 word #2

"**ability**" is word #2 of the 2048 words in the official BIP39 English wordlist, between [abandon](/bip39-word/abandon/) and [able](/bip39-word/able/). In a seed phrase it stands for the 11-bit value `00000000001`, decimal index 1\. 

/əˈbɪlɪti/  · _noun:_ the power or skill to do something 

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

## Binary Representation

A single 1-bit: 1 is a power of two, like the indexes of [able](/bip39-word/able/), [above](/bip39-word/above/), [absurd](/bip39-word/absurd/), [acoustic](/bip39-word/acoustic/), [advice](/bip39-word/advice/), [amount](/bip39-word/amount/), [avoid](/bip39-word/avoid/), [cactus](/bip39-word/cactus/), [divorce](/bip39-word/divorce/) and [length](/bip39-word/length/).

One wrong bit turns it into (leftmost bit first):

[lens](/bip39-word/lens/)[dizzy](/bip39-word/dizzy/)[cage](/bip39-word/cage/)[awake](/bip39-word/awake/)[amused](/bip39-word/amused/)[aerobic](/bip39-word/aerobic/)[acquire](/bip39-word/acquire/)[abuse](/bip39-word/abuse/)[absent](/bip39-word/absent/)[about](/bip39-word/about/)[abandon](/bip39-word/abandon/) 

Position

Hex Index

0x001

4-Letter Prefix

abil

## About "ability" in BIP39

- "ability" has 7 letters, but the first three, **"abi"**, already identify it, because **"ab"** also begins 9 other words, among them [abandon](/bip39-word/abandon/), [able](/bip39-word/able/), [about](/bip39-word/about/) and [above](/bip39-word/above/). Three letters are enough for only 604 of the 2048 words.
- "ability" appears in one of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vector #22 (word 8 of 12). 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 #22

[vessel](/bip39-word/vessel/) [ladder](/bip39-word/ladder/) [alter](/bip39-word/alter/) [error](/bip39-word/error/) [federal](/bip39-word/federal/) [sibling](/bip39-word/sibling/) [chat](/bip39-word/chat/) ability [sun](/bip39-word/sun/) [glass](/bip39-word/glass/) [valve](/bip39-word/valve/) [picture](/bip39-word/picture/) 

## Word #2 in the Other 9 BIP39 Wordlists

[Czech](/czech/) abeceda 

[French](/french/) abandon 

[Italian](/italian/) abbaglio 

[Japanese](/japanese/) あいさつ 

[Korean](/korean/) 가끔 

[Portuguese](/portuguese/) abaixo 

[Spanish](/spanish/) abdomen 

[Traditional Chinese](/chinese-traditional/) 一 

[Simplified Chinese](/chinese-simplified/) 一 

## More BIP39 Words Starting with "A"

[ #1 abandon ](/bip39-word/abandon/)[ #3 able ](/bip39-word/able/)[ #4 about ](/bip39-word/about/)[ #5 above ](/bip39-word/above/)[ #6 absent ](/bip39-word/absent/)[ #134 awful ](/bip39-word/awful/)[ #135 awkward ](/bip39-word/awkward/)[ #136 axis ](/bip39-word/axis/) 

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

## Seed phrase, key and recovery guides

- [BIP38 Encrypted Private Keys: 6P Format and How to Decrypt](/bip38/)
- [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/)

[ Full BIP39 Wordlist ](/)