---
title: "BIP39 Word #1243: opera — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/opera/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1243 10011011010 

# opera — BIP39 word #1243

"**opera**" is word #1243 of the 2048 words in the official BIP39 English wordlist, between [open](/bip39-word/open/) and [opinion](/bip39-word/opinion/). In a seed phrase it stands for the 11-bit value `10011011010`, decimal index 1242\. 

/ˈɒpərə/  · _noun:_ a dramatic work in which the words are sung to music 

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

## 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):

[brave](/bip39-word/brave/)[swap](/bip39-word/swap/)[robust](/bip39-word/robust/)[mercy](/bip39-word/mercy/)[nation](/bip39-word/nation/)[palm](/bip39-word/palm/)[off](/bip39-word/off/)[olympic](/bip39-word/olympic/)[orange](/bip39-word/orange/)[only](/bip39-word/only/)[opinion](/bip39-word/opinion/) 

Position

Hex Index

0x4DA

4-Letter Prefix

oper

## About "opera" in BIP39

- "opera" has 5 letters, but the first four, **"oper"**, already identify it, because **"ope"** also begins [open](/bip39-word/open/).
- **"oper"** is unique only within the English list: it also begins operato in the [Italian list](/italian/), operador in the [Portuguese list](/portuguese/) and operace in the [Czech list](/czech/), so a four-letter backup should say which list it uses.

## Word #1243 in the Other 9 BIP39 Wordlists

[Czech](/czech/) poctivec 

[French](/french/) miauler 

[Italian](/italian/) pedalare 

[Japanese](/japanese/) つめたい 

[Korean](/korean/) 왼쪽 

[Portuguese](/portuguese/) matutar 

[Spanish](/spanish/) nobleza 

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

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

## Similar Words — Check Carefully During Recovery

Words sharing the first three letters "ope":

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

## More BIP39 Words Starting with "O"

[ #1239 onion ](/bip39-word/onion/)[ #1240 online ](/bip39-word/online/)[ #1241 only ](/bip39-word/only/)[ #1242 open ](/bip39-word/open/)[ #1244 opinion ](/bip39-word/opinion/)[ #1245 oppose ](/bip39-word/oppose/)[ #1246 option ](/bip39-word/option/)[ #1247 orange ](/bip39-word/orange/) 

[View all words starting with "O" ](/bip39-words/o/) 

## 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 ](/)