Bip39 Standard. Thanks to the cryptographic structure of BIP-39, a weak passphrase doesn't lessen the security of one other wallets or support expose the seed words. And you should have published it down in the event you had been hoping to help keep a possibility open to restore your accounts. https://bookmarkuse.com/story18752678/bip39-passphrase-https-linktr-ee-bip39-the-basic-principles-of-bip39-mnemonic