the better way is probably to store this particular sensible password on a piece of paper , stored in a safe place.
That could work for a few passwords, but when you have quite a number of passwords to keep track of, it becomes very inconvenient to store them on paper. It also makes it easy for people with physical access to steal all your passwords.
If you have a Trezor, you can actually use it for a password manager as well. See
https://trezor.io/passwords/ for more information.