---
title: "BIP39 Word #26: add — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/add/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #26 00000011001 

# add — BIP39 word #26

"**add**" is word #26 of the 2048 words in the official BIP39 English wordlist, between [adapt](/bip39-word/adapt/) and [addict](/bip39-word/addict/). In a seed phrase it stands for the 11-bit value `00000011001`, decimal index 25\. 

/æd/  · _verb:_ to put one thing together with another, or combine numbers 

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

## Binary Representation

Three 1-bits and eight 0-bits; 165 of the 2048 indexes have exactly three 1-bits.

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

[lobster](/bip39-word/lobster/)[drip](/bip39-word/drip/)[case](/bip39-word/case/)[basket](/bip39-word/basket/)[arctic](/bip39-word/arctic/)[already](/bip39-word/already/)[abuse](/bip39-word/abuse/)[acquire](/bip39-word/acquire/)[admit](/bip39-word/admit/)[address](/bip39-word/address/)[adapt](/bip39-word/adapt/) 

Position

Hex Index

0x019

4-Letter Prefix

add

## About "add" in BIP39

- All three letters of "add" also begin longer words: [addict](/bip39-word/addict/) and [address](/bip39-word/address/). So "add" cannot be shortened, and a backup that keeps the first four letters of each word stores it as **"add"** but addict as **"addi"**.

## Word #26 in the Other 9 BIP39 Wordlists

[Czech](/czech/) autobus 

[French](/french/) accroche 

[Italian](/italian/) adottare 

[Japanese](/japanese/) あてな 

[Korean](/korean/) 간판 

[Portuguese](/portuguese/) acervo 

[Spanish](/spanish/) acto 

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

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

## Similar Words — Check Carefully During Recovery

Swap two neighbouring letters and "add" becomes [dad](/bip39-word/dad/), another valid word that is easy to miss when copying a phrase. 

Read aloud, "add" /æd/ is one sound away from these 3 words: 

[dad /dæd/](/bip39-word/dad/)[mad /mæd/](/bip39-word/mad/)[sad /sæd/](/bip39-word/sad/) 

Words sharing the first three letters "add":

[addict](/bip39-word/addict/)[address](/bip39-word/address/) 

## More BIP39 Words Starting with "A"

[ #22 actor ](/bip39-word/actor/)[ #23 actress ](/bip39-word/actress/)[ #24 actual ](/bip39-word/actual/)[ #25 adapt ](/bip39-word/adapt/)[ #27 addict ](/bip39-word/addict/)[ #28 address ](/bip39-word/address/)[ #29 adjust ](/bip39-word/adjust/)[ #30 admit ](/bip39-word/admit/) 

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

## Seed phrase, key and recovery guides

- [How to Encrypt a Seed Phrase: AES, XOR and Steganography](/seed-phrase-encrypting-with-aes-xor-and-steganography/)
- [Bitcoin Improvement Proposal (BIP): Process and Deployed BIP List](/bitcoin-improvement-proposal/)
- [TON Seed Phrase: 24-Word Format vs 12-Word BIP39 Phrases](/seed-phrase-format-for-ton-wallets/)

[ Full BIP39 Wordlist ](/)