Reservation, Appointment
noun, verbal noun, の adjective
A beforehand promise is a promise you've made beforehand. This is a reservation or appointment. Makes sense, right?
よやく
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
パーマとカットの予約をしたいんですけど。
Could I make an appointment for a haircut and a perm?
夏休みに日本へ行くなら早めに予約した方がいいですよ。
If you're planning to go to Japan during the summer break, it's better to book early.
こちらのアイテムは、先行予約を受付中です！
This item is currently available for pre-order!