to mutate means change.
- the -or at the end of mutat-or tells that it's the one that changes something. changer
- the -able in mut-able tells you it the one that can be changed. changeable
- the Im- at the beginning of Im-mut-able forbids the change. unchangeable
access means to be allowed to get/read/use something
- the -or in access-or tells you it's the one who is allowed get/read/use something.