Слово "reasonable". Англо-русский словарь Мюллера

But the truth is, sir, that Beatrice's friend from the garage as she walks out with got one of them nasty letters, too, and he isn't acting reasonable at all."

I have the right to require obedience because my orders are reasonable."

Be reasonable . . .

And that’s a perfectly reasonable theory in the sense that

Moreover, our fees are far more reasonable, and bring you an improved product.

then that is already a disaster by any reasonable measure.