---
title: "BIP39 Word #1637: smart — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/smart/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1637 11001100100 

# smart — BIP39 word #1637

"**smart**" is word #1637 of the 2048 words in the official BIP39 English wordlist, between [small](/bip39-word/small/) and [smile](/bip39-word/smile/). In a seed phrase it stands for the 11-bit value `11001100100`, decimal index 1636\. 

/smɑːt/  · _adjective:_ intelligent, or neat and well dressed 

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

## Binary Representation

Five 1-bits and six 0-bits; 462 of the 2048 indexes have exactly five 1-bits.

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

[erode](/bip39-word/erode/)[milk](/bip39-word/milk/)[uncle](/bip39-word/uncle/)[symptom](/bip39-word/symptom/)[setup](/bip39-word/setup/)[silk](/bip39-word/silk/)[soldier](/bip39-word/soldier/)[snow](/bip39-word/snow/)[slot](/bip39-word/slot/)[smoke](/bip39-word/smoke/)[smile](/bip39-word/smile/) 

Position

Hex Index

0x664

4-Letter Prefix

smar

## About "smart" in BIP39

- "smart" has 5 letters, but the first four, **"smar"**, already identify it, because **"sma"** also begins [small](/bip39-word/small/).
- **"smar"** is unique only within the English list: it also begins smarrito in the [Italian list](/italian/) and smaragd in the [Czech list](/czech/), so a four-letter backup should say which list it uses.

## Word #1637 in the Other 9 BIP39 Wordlists

[Czech](/czech/) svalstvo 

[French](/french/) renoncer 

[Italian](/italian/) sfaticato 

[Japanese](/japanese/) ひつぜん 

[Korean](/korean/) 진로 

[Portuguese](/portuguese/) rede 

[Spanish](/spanish/) romero 

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

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

## Similar Words — Check Carefully During Recovery

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

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

Words sharing the first three letters "sma":

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

## More BIP39 Words Starting with "S"

[ #1633 slot ](/bip39-word/slot/)[ #1634 slow ](/bip39-word/slow/)[ #1635 slush ](/bip39-word/slush/)[ #1636 small ](/bip39-word/small/)[ #1638 smile ](/bip39-word/smile/)[ #1639 smoke ](/bip39-word/smoke/)[ #1640 smooth ](/bip39-word/smooth/)[ #1641 snack ](/bip39-word/snack/) 

[View all words starting with "S" ](/bip39-words/s/) 

## Seed phrase, key and recovery guides

- [Ethereum Keystore File (JSON Wallet): Structure and Security](/json-wallets-explained/)
- [What Is BIP39? The Standard Behind Seed Phrases](/bip39-the-foundation-of-crypto-wallet-security/)
- [Seed Phrase Examples: 12, 18 and 24 BIP39 Mnemonic Phrases](/mnemonic-words-examples-for-crypto-security-bip39/)

[ Full BIP39 Wordlist ](/)