---
title: "BIP39 Word #840: happy — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/happy/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #840 01101000111 

# happy — BIP39 word #840

"**happy**" is word #840 of the 2048 words in the official BIP39 English wordlist, between [hand](/bip39-word/hand/) and [harbor](/bip39-word/harbor/). In a seed phrase it stands for the 11-bit value `01101000111`, decimal index 839\. 

/ˈhæpi/  · _adjective:_ feeling or showing pleasure and contentment 

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

## 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):

[trophy](/bip39-word/trophy/)[cigar](/bip39-word/cigar/)[employ](/bip39-word/employ/)[jump](/bip39-word/jump/)[genius](/bip39-word/genius/)[hollow](/bip39-word/hollow/)[helmet](/bip39-word/helmet/)[hazard](/bip39-word/hazard/)[half](/bip39-word/half/)[hamster](/bip39-word/hamster/)[hand](/bip39-word/hand/) 

Position

Hex Index

0x347

4-Letter Prefix

happ

## About "happy" in BIP39

- "happy" has 5 letters, but the first three, **"hap"**, already identify it, because **"ha"** also begins 14 other words, among them [habit](/bip39-word/habit/), [hair](/bip39-word/hair/), [half](/bip39-word/half/) and [hammer](/bip39-word/hammer/). Three letters are enough for only 604 of the 2048 words.
- "happy" appears in one of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vector #15 (word 13 of 24). 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 #15

[hamster](/bip39-word/hamster/) [diagram](/bip39-word/diagram/) [private](/bip39-word/private/) [dutch](/bip39-word/dutch/) [cause](/bip39-word/cause/) [delay](/bip39-word/delay/) [private](/bip39-word/private/) [meat](/bip39-word/meat/) [slide](/bip39-word/slide/) [toddler](/bip39-word/toddler/) [razor](/bip39-word/razor/) [book](/bip39-word/book/) happy [fancy](/bip39-word/fancy/) [gospel](/bip39-word/gospel/) [tennis](/bip39-word/tennis/) [maple](/bip39-word/maple/) [dilemma](/bip39-word/dilemma/) [loan](/bip39-word/loan/) [word](/bip39-word/word/) [shrug](/bip39-word/shrug/) [inflict](/bip39-word/inflict/) [delay](/bip39-word/delay/) [length](/bip39-word/length/) 

## Word #840 in the Other 9 BIP39 Wordlists

[Czech](/czech/) mihule 

[French](/french/) flèche 

[Italian](/italian/) inflitto 

[Japanese](/japanese/) しゃけん 

[Korean](/korean/) 설문 

[Portuguese](/portuguese/) filtrar 

[Spanish](/spanish/) guitarra 

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

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

## More BIP39 Words Starting with "H"

[ #836 half ](/bip39-word/half/)[ #837 hammer ](/bip39-word/hammer/)[ #838 hamster ](/bip39-word/hamster/)[ #839 hand ](/bip39-word/hand/)[ #841 harbor ](/bip39-word/harbor/)[ #842 hard ](/bip39-word/hard/)[ #843 harsh ](/bip39-word/harsh/)[ #844 harvest ](/bip39-word/harvest/) 

[View all words starting with "H" ](/bip39-words/h/) 

## Seed phrase, key and recovery guides

- [How to View & Recover Bitcoin Wallet.dat Content](/how-to-view-and-recover-bitcoin-wallet-dat-content/)
- [Bitcoin Private Key Format: WIF, Base58 and Hex Explained](/private-key-btc/)
- [How to Encrypt a Seed Phrase: AES, XOR and Steganography](/seed-phrase-encrypting-with-aes-xor-and-steganography/)

[ Full BIP39 Wordlist ](/)