---
title: "BIP39 Word #21: action — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/action/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #21 00000010100 

# action — BIP39 word #21

"**action**" is word #21 of the 2048 words in the official BIP39 English wordlist, between [act](/bip39-word/act/) and [actor](/bip39-word/actor/). In a seed phrase it stands for the 11-bit value `00000010100`, decimal index 20\. 

/ˈækʃ(ə)n/  · _noun:_ the process of doing something to achieve an aim 

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

## Binary Representation

Two 1-bits and nine 0-bits; 55 of the 2048 indexes have exactly two 1-bits.

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

[little](/bip39-word/little/)[dream](/bip39-word/dream/)[card](/bip39-word/card/)[barely](/bip39-word/barely/)[appear](/bip39-word/appear/)[alley](/bip39-word/alley/)[above](/bip39-word/above/)[adjust](/bip39-word/adjust/)[acoustic](/bip39-word/acoustic/)[actress](/bip39-word/actress/)[actor](/bip39-word/actor/) 

Position

Hex Index

0x014

4-Letter Prefix

acti

## About "action" in BIP39

- "action" has 6 letters, but the first four, **"acti"**, already identify it, because **"act"** also begins [act](/bip39-word/act/), [actor](/bip39-word/actor/), [actress](/bip39-word/actress/) and [actual](/bip39-word/actual/).
- Its first letters also spell another BIP39 word, [act](/bip39-word/act/). Write "action" out in full: cut short, it turns into a different valid word.
- **"acti"** is unique only within the English list: it also begins actif in the [French list](/french/) and activo in the [Spanish list](/spanish/), so a four-letter backup should say which list it uses.

## Word #21 in the Other 9 BIP39 Wordlists

[Czech](/czech/) astma 

[French](/french/) acarien 

[Italian](/italian/) addebito 

[Japanese](/japanese/) あつい 

[Korean](/korean/) 간격 

[Portuguese](/portuguese/) acanhar 

[Spanish](/spanish/) aclarar 

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

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

## Similar Words — Check Carefully During Recovery

 One BIP39 word differs from "action" by just a single letter — the most common source of typos when a seed phrase is entered by hand: 

[auction](/bip39-word/auction/) 

Words sharing the first three letters "act":

[act](/bip39-word/act/)[actor](/bip39-word/actor/)[actress](/bip39-word/actress/)[actual](/bip39-word/actual/) 

## More BIP39 Words Starting with "A"

[ #17 acoustic ](/bip39-word/acoustic/)[ #18 acquire ](/bip39-word/acquire/)[ #19 across ](/bip39-word/across/)[ #20 act ](/bip39-word/act/)[ #22 actor ](/bip39-word/actor/)[ #23 actress ](/bip39-word/actress/)[ #24 actual ](/bip39-word/actual/)[ #25 adapt ](/bip39-word/adapt/) 

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

## Seed phrase, key and recovery guides

- [Cold Sharding: Splitting a Private Key Into Offline Shamir Shares](/cold-sharding-method-private-key-storage-strategy/)
- [Test Your Wallet Backup: A Self-Audit of Your Seed Phrase](/hack-own-crypto-wallet/)
- [EVM Address Format Explained: Structure & Usage](/format-evm-addresses/)

[ Full BIP39 Wordlist ](/)