一 + 个 + 约
约 (yuē) means "agreement," "appointment," or "pact" when used as a noun. It refers to a mutual arrangement or commitment between parties, and is commonly used in both formal and everyday contexts.
我和朋友有个约,周六一起吃饭。
Wǒ hé péngyǒu yǒu ge yuē, zhōuliù yīqǐ chīfàn.
I have a date with a friend to eat together on Saturday.
他从来不会忘记和别人的约。
Tā cónglái bù huì wàngjì hé biérén de yuē.
He never forgets an appointment with someone.
我们之间有个约,互相保守这个秘密。
Wǒmen zhī jiān yǒu ge yuē, hùxiāng bǎoshǒu zhège mìmì.
We have an agreement between us to keep this secret for each other.