This is a duplicate. There are lots of other threads talking about this.
Please see the links below:
- Brand new Bitwarden user: First impressions and To-Do's
- Generate pronounceable passwords
- Choose the word list for passphrases - #5 by MetBril
- Customize pool of special characters available in password generator
Also, don’t forget to check the passphrase generator in the platforms. It already has high entropy and can secure you from security breaches, as well as keeping them memorable, so you can remember later, if necessary.