---
title: "BIP39 Word #1786: tennis — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/tennis/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #1786 11011111001 

# tennis — BIP39 word #1786

"**tennis**" is word #1786 of the 2048 words in the official BIP39 English wordlist, between [tenant](/bip39-word/tenant/) and [tent](/bip39-word/tent/). In a seed phrase it stands for the 11-bit value `11011111001`, decimal index 1785\. 

/ˈtɛnɪs/  · _noun:_ a game in which players hit a ball over a net with rackets 

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

## Binary Representation

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

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

[game](/bip39-word/game/)[palace](/bip39-word/palace/)[you](/bip39-word/you/)[song](/bip39-word/song/)[strong](/bip39-word/strong/)[swamp](/bip39-word/swamp/)[tag](/bip39-word/tag/)[taste](/bip39-word/taste/)[text](/bip39-word/text/)[term](/bip39-word/term/)[tenant](/bip39-word/tenant/) 

Position

Hex Index

0x6F9

4-Letter Prefix

tenn

## About "tennis" in BIP39

- "tennis" has 6 letters, but the first four, **"tenn"**, already identify it, because **"ten"** also begins [ten](/bip39-word/ten/), [tenant](/bip39-word/tenant/) and [tent](/bip39-word/tent/).
- Its first letters also spell another BIP39 word, [ten](/bip39-word/ten/). Write "tennis" out in full: cut short, it turns into a different valid word.
- "tennis" 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 16 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](/bip39-word/happy/) [fancy](/bip39-word/fancy/) [gospel](/bip39-word/gospel/) 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 #1786 in the Other 9 BIP39 Wordlists

[Czech](/czech/) uvozovka 

[French](/french/) sombre 

[Italian](/italian/) suonare 

[Japanese](/japanese/) ほめる 

[Korean](/korean/) 큰딸 

[Portuguese](/portuguese/) siri 

[Spanish](/spanish/) tabla 

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

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

## Similar Words — Check Carefully During Recovery

Words sharing the first three letters "ten":

[ten](/bip39-word/ten/)[tenant](/bip39-word/tenant/)[tent](/bip39-word/tent/) 

## More BIP39 Words Starting with "T"

[ #1782 team ](/bip39-word/team/)[ #1783 tell ](/bip39-word/tell/)[ #1784 ten ](/bip39-word/ten/)[ #1785 tenant ](/bip39-word/tenant/)[ #1787 tent ](/bip39-word/tent/)[ #1788 term ](/bip39-word/term/)[ #1789 test ](/bip39-word/test/)[ #1790 text ](/bip39-word/text/) 

[View all words starting with "T" ](/bip39-words/t/) 

## Seed phrase, key and recovery guides

- [xpub, ypub and zpub: Extended Public Keys Explained](/xpub-ypub-zpub/)
- [SLIP-39 vs BIP39: Shamir Backup and 20-Word Shares Explained](/slip39-vs-bip39/)
- [Why You Should Never Create Your Own Seed Phrase](/why-you-should-never-create-your-own-seed-phrase/)

[ Full BIP39 Wordlist ](/)