防凍(ぼうとう)

ぼうとう
noun
freeze prevention; antifreeze
technical
1. freeze prevention; antifreeze
The act or method of preventing freezing, or a substance used for that purpose. Applied to water pipes, vehicles, and other equipment exposed to cold temperatures.
防凍(ぼうとう)液(えき)を補充(ほじゅう)する。
Top up the antifreeze fluid.
冬(ふゆ)になる前(まえ)に水道管(すいどうかん)の防凍(ぼうとう)対策(たいさく)をしておく。
Take freeze-prevention measures for the water pipes before winter arrives.
寒冷地(かんれいち)では防凍(ぼうとう)剤(ざい)を入(い)れないとエンジンが壊(こわ)れる恐(おそ)れがある。
In cold regions, the engine may be damaged if antifreeze is not added.

A technical term combining 防(ぼう) (prevention) and 凍(とう) (freezing). Used in automotive, plumbing, and construction contexts for measures and substances that protect against freeze damage.

Common collocations

  • 防凍(ぼうとう)液(えき): antifreeze fluid
  • 防凍(ぼうとう)剤(ざい): antifreeze agent
  • 防凍(ぼうとう)対策(たいさく): freeze-prevention measures
  • 防凍(ぼうとう)工事(こうじ): freeze-proofing work

Related words

  • 凍結(とうけつ): freezing — the phenomenon that 防凍(ぼうとう) aims to prevent
  • 不凍液(ふとうえき): antifreeze liquid — another common term for the same substance

Related Words

Related: 凍結(とうけつ) (freezing)
Compare: 不凍(ふとう) (non-freezing)
general
Added 2026.5.5 0:30 · Revised 2026.9.2 13:02
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