This is the 3703rd most frequent Japanese word.
お子さん
"お子さん" refers to "your child" or "someone else's child" in a polite or respectful manner.
In this sentence, 'お子さん' is used politely to refer to someone's child during a formal or respectful conversation.
お子さんは何歳ですか？
How old is your child?
Here, 'お子さん' is respectfully referencing another person's child, showing politeness in the social context of the conversation.
お子さんが学校で楽しく過ごしていると聞きました。
I heard that your child is enjoying school.
In this example, 'お子さん' refers to multiple children respectfully, commonly used when addressing families with more than one child.