Alert vs Wake her up

When to use each in English, with meaning, register, and examples.

Alert

Top 1,000 (very common)C1verb

Wake her up

Top 2,000 (common)
Most common: Alert
 AlertWake her up
Pronunciation🇬🇧 /["/əˈlɜːt/","/əˈlɜːts/","/əˈlɜːtɪd/","/əˈlɜːtɪŋ/"]/🇺🇸 /["/əˈlɜːrt/","/əˈlɜːrts/","/əˈlɜːrtɪd/","/əˈlɜːrtɪŋ/"]/🇬🇧 //weɪk hɜːr ʌp//🇺🇸 //weɪk hɜːr ʌp//
MeaningAware and paying attention; quick to notice things.To make someone stop sleeping.
ExampleNeighbours quickly alerted the emergency services.I need to wake her up before we leave for the trip.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelC1-
Part of speechverb
Collocationsstay alert, alert to danger, make someone alert, be alert for signswake someone up, wake her up gently, wake him up early, wake up to an alarm, wake someone up for breakfast
Antonymsunaware, distracted, sleepy-
Common mistakes'Alert' used as a noun instead of an adjective., Confused with 'alarmed', which means frightened., Using 'alerts' incorrectly as a verb form.Confusing it with 'wake up' without an object., Using it with wrong pronouns, e.g., 'wake she up'., Incorrectly saying 'woke her up' when talking about a past event.
Usage notesUse 'alert' to describe someone who is attentive. It can be used in formal and informal contexts, but avoid using it in very casual conversations.Use 'wake her up' when you mean to help someone get out of sleep. It's neutral and informal, but can be used in most contexts where someone is sleeping.

See it in real clips

Alert
Wake her up

Frequently asked questions: Alert vs Wake her up

What's the difference between Alert and Wake her up?

Alert: Aware and paying attention; quick to notice things. Wake her up: To make someone stop sleeping.

Which is more common: Alert and Wake her up?

Alert is the most common in everyday English.

Can you show an example of each?

Alert: Neighbours quickly alerted the emergency services. Wake her up: I need to wake her up before we leave for the trip.

Can I use Alert and Wake her up interchangeably?

Not always. Alert and Wake her up are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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