「歳」は、年れいを数えるときに使う言葉です。名前のあとに数字をつけて「三十歳」のように言います。

"歳" is a word used to count age. It is said by adding a number after a name, like "三十歳" (thirty years old).

「今、何歳ですか?」のように、年を聞くときにもよく使います。

It is also often used when asking someone's age, as in "今、何歳ですか?" (How old are you now?).