To Become Empty
To Become Vacant, To Become Available
intransitive verb, godan verb
You have the kanji for empty, so this verb means to become empty.
It can also have a slightly different meaning when it's read differently, but you'll learn this through other words later on, so don't worry about it for now.
Whenever something is about to become empty, you can't help saying "Ah…" (あ) to express your disappointment. Your glass of water is becoming empty? Ah… Your bag of chips is becoming empty? Ah… Exclaiming a little "Ah…" is the only thing that helps you cope with the sadness of your favorite things becoming empty.
空いたグラス
an empty glass
空いたスペース
available space
空いた時間
free time
グラスが空く
a glass becomes empty
テーブルが空く
a table becomes available
時間が空く
to have free time
マサオのグラスが空くと、ミチコはそっとワインを注いだ。
When Masao's glass became empty, Michiko quietly poured wine into it.
スケジュールが空いてる日を教えてください。
Please let me know the days when your schedule is free.
ラッキーなことに、テーブルが一つ空いていたのですぐ店に入れました。
Luckily, there was one available table, so we were able to get seated at the restaurant right away.