Meaning of 虔 in Japanese

若い娘には慎みが似つかわしい。
Modesty is befitting to a young girl.

その人は慎み深いのか、それとも怠惰なのかと人は思うだろう。
They would think the person is modest or lazy.

時が時だからことばを慎みなさい。
As the situation is delicate, you should be careful of what you say.

いかにも敬虔なるクリスチャンが送る、礼節重き言葉です。
So characteristic of what a pious Christian would say, this courteous phrase.