妥当 in inglese:

≠ unreasonable

You said yourself they acted pretty reasonable. / I think that's a reasonable request. / You're a very reasonable person... unlike him.

Men are rather reasoning than reasonable animals, for the most part governed by the impulse of passion.

Falling in love is the one illogical adventure, the one thing of which we are tempted to think as supernatural, in our trite and reasonable world.

It was quite possible to buy a house, just as it is in England, provided one gives up the idea of buying a home one likes, and at a reasonable price.

The Christian Religion not only was at first attended with miracles, but even at this day cannot be believed by any reasonable person without one. Mere reason is insufficient to convince us of its veracity.

How is it that otherwise reasonable people come to believe that this same roof, that practically vanishing commodity, is freely obtainable just by packing up and going to another country?

To persuade somebody that your recommendation is reasonable and wise, you have to give reasons and quote known examples and authorities.

Philosophy teaches us to feel uncertain about the things that seem to us self-evident. Propaganda, on the other hand, teaches us to accept as self-evident matters about which it would be reasonable to suspend our judgment or to feel doubt.

I wasn't happy, but it seemed reasonable that his prices should go up like everything else, so I agreed.

Why do you suppose it is that, whilst almost everyone claims to be a reasonable

If you ​tell him what ​happened, I'm ​sure he'll ​understand - he's a reasonable man.

Many reasonable-looking restaurants have very expensive wine lists.

Any reasonable person would have done exactly as you did.

There was a reasonable increase in sales after the advertising campaign was launched, but nothing spectacular.