Cryptocurrency Explained: Can Words in a BIP39 Mnemonic Repeat? [Bitcoin, Ethereum, Security] @aantonop
Cryptocurrency Explained: Can Words in a BIP39 Mnemonic Repeat? [Bitcoin, Ethereum, Security]  @aantonop
Uploaded January 2021 | Updated September 2026, 1 hour ago
Recently, Andreas was asked if words in a BIP39 mnemonic can repeat. The short answer is yes. If you want to learn more about how mnemonics work, and really understand your bitcoin, ethereum, or other cryptocurrency wallet, watch this 2 min video.

Chapter
0:00 Can words repeat in a mnemonic phrase?
0:10 Yes the word about repeated 23 times plus a valid checksum word is a valid mnemonic
0:58 In the English BIP39 dictionary, you only need the first 4 letters of each word!

Learn more about bitcoin and cryptocurrency key security by watching these videos:
Here's an entire playlist: youtube.com/playlist?list=PLPQwGV1aLnTtAmzmz6uVE0kTKXtaGX1zY
or watch
What is a mnemonic phrase? youtu.be/pIvgjCvGlwo
Can someone guess my private key? youtu.be/2eZ5DP2P5As
Setting up secure storage devices: youtu.be/wZ9LxLLvfXc
Worst ways to store bitcoin: youtu.be/x6rnAGscBrU

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Cryptocurrency Explained: Can Words in a BIP39 Mnemonic Repeat? [Bitcoin, Ethereum, Security]

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