Appropriate, reasonable, or valid for the situation; logically acceptable.
その結論はデータに基づいており、妥当だ。
That conclusion is based on data and is reasonable.
今回の処置は最も妥当な選択だったと思う。
I think this action was the most appropriate choice.
妥当な予算配分を検討する必要がある。
We need to consider a reasonable allocation of the budget.