This is the 16798th most frequent Russian word.
сменить
To change, replace, or switch.
The verb 'сменить' is used here to indicate transitioning from one profession to another.
Я решил сменить профессию.
I decided to change my profession.
Here, 'сменить' refers to replacing an old password with a new one.
Необходимо сменить старый пароль.
It's necessary to change the old password.
In this example, 'сменить' means altering the focus of the conversation to a different subject.