alarm clock
US /əˈlɑːrm klɑːk/
UK /əˈlɑːrm klɑːk/

1.
wekker
a clock that can be set to wake a person at a particular time by sounding a buzzer or bell
:
•
I set my alarm clock for 6 AM.
Ik zette mijn wekker op 6 uur 's ochtends.
•
The loud ringing of the alarm clock startled me awake.
Het luide rinkelen van de wekker schrok me wakker.