警報機(けいほうき)

けいほうき
noun
alarm; warning device; siren
1. alarm; warning device; siren
A device that sounds or flashes an alarm to warn of danger, such as at railroad crossings, in buildings for fire safety, or in security systems.
警報機(けいほうき)が鳴(な)った。
The alarm sounded.
踏切(ふみきり)の警報機(けいほうき)が鳴(な)り始(はじ)めた。
The warning bell at the railroad crossing started ringing.
火災(かさい)警報機(けいほうき)の設置(せっち)が義務(ぎむ)付(づ)けられている。
The installation of fire alarms is mandatory.

USAGE:
警報機(けいほうき) is a general term for any warning or alarm device. The most common contexts are 踏切(ふみきり) (railroad crossings), where both 警報機(けいほうき) and 遮断機(しゃだんき) (barrier gate) work together, and 火災(かさい)警報機(けいほうき) (fire alarms) in buildings.

WORD FORMATION:
警報(けいほう) (alarm, warning) + 機(き) (machine, device).

COMMON COLLOCATIONS:

  • 警報機(けいほうき)が鳴(な)る: the alarm sounds
  • 火災(かさい)警報機(けいほうき): fire alarm
  • 踏切(ふみきり)の警報機(けいほうき): railroad crossing alarm
  • 警報機(けいほうき)を設置(せっち)する: to install an alarm

Related Words

Related: 遮断機(しゃだんき) (crossing gate)
general
Added 2026.3.11 17:07
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