saner , sanest
Someone who is sane is able to think and behave normally and reasonably, and is not mentally ill.
He seemed perfectly sane.
他看来心智非常健全。
If you refer to a sane person, action, or system, you mean one that you think is reasonable and sensible.
No sane person wishes to see conflict or casualties.
理智的人都不希望看到冲突或伤亡。