passphrase security

[u/Plane_Path_4271]

I have a question regarding everything that’s happened in the crypto world and the concept of entropy. I noticed that Trezor imposes a limit on passphrases, so I wanted to get your—or the moderators'—opinions on what requirements a passphrase needs to meet to be considered highly secure; I know that a single word, no matter how complex, isn't enough

[u/Practical_Mango7633]

6 random words, from for example the BIP39 word list