---
title: "BIP39 Word #1638: smile — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/smile/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1638 11001100101 

# smile — BIP39 word #1638

"**smile**" is word #1638 of the 2048 words in the official BIP39 English wordlist, between [smart](/bip39-word/smart/) and [smoke](/bip39-word/smoke/). In a seed phrase it stands for the 11-bit value `11001100101`, decimal index 1637\. 

/smaɪl/  · _verb:_ to turn up the corners of your mouth to show happiness 

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

## 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):

[erosion](/bip39-word/erosion/)[million](/bip39-word/million/)[uncover](/bip39-word/uncover/)[syrup](/bip39-word/syrup/)[seven](/bip39-word/seven/)[silly](/bip39-word/silly/)[solid](/bip39-word/solid/)[soap](/bip39-word/soap/)[slow](/bip39-word/slow/)[smooth](/bip39-word/smooth/)[smart](/bip39-word/smart/) 

Position

Hex Index

0x665

4-Letter Prefix

smil

## About "smile" in BIP39

- "smile" has 5 letters, but the first three, **"smi"**, already identify it, because **"sm"** also begins [small](/bip39-word/small/), [smart](/bip39-word/smart/), [smoke](/bip39-word/smoke/) and [smooth](/bip39-word/smooth/). Three letters are enough for only 604 of the 2048 words.
- **"smil"** is unique only within the English list: it also begins smilzo in the [Italian list](/italian/) and smilstvo in the [Czech list](/czech/), so a four-letter backup should say which list it uses.

## Word #1638 in the Other 9 BIP39 Wordlists

[Czech](/czech/) svetr 

[French](/french/) rentrer 

[Italian](/italian/) sfera 

[Japanese](/japanese/) ぴったり 

[Korean](/korean/) 진료 

[Portuguese](/portuguese/) redimir 

[Spanish](/spanish/) romper 

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

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

## Similar Words — Check Carefully During Recovery

Read aloud, "smile" /smaɪl/ is one sound away from these 2 words: 

[small /smɔːl/](/bip39-word/small/)[style /staɪl/](/bip39-word/style/) 

## More BIP39 Words Starting with "S"

[ #1634 slow ](/bip39-word/slow/)[ #1635 slush ](/bip39-word/slush/)[ #1636 small ](/bip39-word/small/)[ #1637 smart ](/bip39-word/smart/)[ #1639 smoke ](/bip39-word/smoke/)[ #1640 smooth ](/bip39-word/smooth/)[ #1641 snack ](/bip39-word/snack/)[ #1642 snake ](/bip39-word/snake/) 

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

## Seed phrase, key and recovery guides

- [How to Protect Your Crypto Wallet from Phishing](/protect-crypto-wallet-from-phishing/)
- [Monero Seed Phrase: 25 Words, Polyseed and Private Keys](/seed-phrase-and-private-key-format-of-monero-guide/)
- [BIP85: Derive Many Seed Phrases From One Seed](/bip85/)

[ Full BIP39 Wordlist ](/)