1.
alarm clock
A clock that can be set to make a sound at a specific time, typically used to wake someone up.
Related Words
Related:
時計
Related:
アラーム (alarm)
Related:
起きる (to wake up)
Related:
掛け時計 (wall clock)
Related:
置時計 (table clock)
Related:
電波時計 (radio-controlled clock)