"Wake-up time" is the time when someone wakes up in the morning. It is a common phrase used in everyday Engpsh.

The phrase "wake-up time" is a compound noun, made up of two words: "wake" and "up." "Wake" is a verb that means to become awake or to be roused from sleep. "Up" is an adverb that indicates the direction toward or away from a certain point, in this case, toward being awake. Together, "wake" and "up" form the verb phrase "wake up," which means to stop sleeping and become awake.

Here are some examples of how "wake-up time" can be used in a sentence:

My wake-up time is 6:00 a.m. every day. (这是我的起床时间,每天早上6点。)
I set my alarm for wake-up time. (我把闹钟设在起床时间。)
Can you wake me up at my usual wake-up time tomorrow? (你明天能在我的起床时间叫醒我吗?)