This is the 18224th most frequent Russian word.
четно
The Russian word "четно" means "even" (as in even numbers).
In this sentence, 'четно' is used as an adjective meaning 'honestly' in the context of how one conducts themselves.
Вы к этому относитесь очень четно.
You regard this very honestly.
Here, 'четно' describes manner, and it emphasizes the integrity in the performance of actions.
Все его действия были четно выполнены.
All his actions were performed honestly.
In this instance, 'четно' signifies the ethical conduct and adherence to honesty in one's actions.